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Shenzhen Creality 3D Technology Co., Ltd. Authorization Company: Shenzhen Creality 3D Technology Co., Ltd. Address: 18F, JinXiuHongDu Building, Meilong Blvd., Longhua Dist., Shenzhen, China 518131 Product Name: 3D Printer Trademark: Model Number(s): Sermoon D3 We authorize MiCOM Labs Inc., 575 Boulder Court, Pleasanton, California 94566, USA, to act on our behalf on all matters concerning the certification of above named equipment. We declare that MiCOM Labs Inc. is allowed to forward all information related to the approval and certification of equipment to the regulatory agencies as required and to discuss any issues concerning the approval application. Any and all acts carried out by MiCOM Labs on our behalf shall have the same effect as acts of our own. Signature: Date: 2022/09/05 Name: Lucy Li Title: Safety enginner Company: Shenzhen Creality 3D Technology Co.,Ltd.

Shenzhen Creality 3D Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2022/09/05 Subject; Request for Confidentiality FCC ID: 2AXH6SERMOOND3 To Whom It May Concern, Pursuant to the provisions of the Commission’s rules Title 47 Sections §0.457 and §0.459, we are requesting the Commission to withhold the following attachment(s) as confidential documents from public disclosure indefinitely. These documents contain detailed system and equipment descriptions and are considered as proprietary information in operation of the equipment. The public disclosure of these documents might be harmful to our company and would give competitors an unfair advantage in the market. Schematic Diagram Block Diagram Operational Description In additional to above mentioned documents, in order to comply with the marketing regulations in Title 47 CFR §2.803 and the importation rules in Title 47 CFR §2.1204, while ensuring that business sensitive information remains confidential until the actual marketing of newly authorized devices, we request Short Term Confidentiality of the following attachment(s); User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuantto KDB 726920 D01. It is our understanding that all measurement test reports, FCC ID label format and correspondence during the certification review process cannot be granted as confidential documents and this information will be available for public review once the grant of equipment authorization is issued. Sincerely, Signature: Name: Lucy Li Title: Safety enginner

EUT EXTERNAL PHOTOGRAPHS EUT View 1 EUT View 2 EUT View 3 EUT View 4 EUT View 5 EUT View 6 ----------------The end----------------

EUT INTERNAL PHOTOGRAPHS EUT Housing and Board View 1 EUT Housing and Board View 2 EUT Housing and Board View 3 EUT Housing and Board View 4 EUT Housing and Board View 5 EUT Housing and Board View 6 EUT Housing and Board View 7 EUT Housing and Board View 8 EUT Housing and Board View 9 EUT Housing and Board View 10 EUT Housing and Board View 11 EUT Housing and Board View 12 EUT Housing and Board View 13 EUT Housing and Board View 14 EUT Housing and Board View 15 EUT Housing and Board View 16 ----------------The end---------------- WIFI ANT BT ANT

FCC ID : 2AXH6SERMOOND3 RF EXPOSURE EVALUATION According to FCC 1.1310: The criteria listed in the following table shall be used to evaluate the environment impact of human exposure to radio frequency (RF) Radiation as specified in §1.1307(b) Limits for Maximum Permissible Exposure (MPE) Frequency Range(MHz) Electric Field Strength(V/m) Magnetic Field Strength(A/m) Power Density(mW/cm 2 ) Average Time (A) Limits for Occupational/Control Exposures 300-1500 -- -- F/300 6 1500-100000 -- -- 5 6 (B) Limits for General Population/Uncontrol Exposures 300-1500 -- -- F/1500 6 1500-100000 -- -- 1 30 11.1 Friis transmission formula: Pd= (Pout*G)\ (4*pi*R 2 ) Where Pd= Power density in mW/cm 2 Pout=output power to antenna in mW G= Numeric gain of the antenna relative to isotropic antenna Pi=3.1416 R= distance between observation point and center of the radiator in cm Pd the limit of MPE, 1mW/cm 2 ,If we know the maximum gain of the nd total power input to the antenna, through the calculation, we will know the distance where the MPE limit is reached. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body. 11.2 Measurement Result WIFI2.4G Antenna gain: 2.27 dBi Measured power (dBm) Tune-up power (dBm) Max tune-up power (dBm) Antenna Gain Numeric Evaluation result (mW/cm2 ) Power density Limits (mW/cm2 ) 16.58 15 to 17 17 1.69 0.0168 1 BLE Antenna gain: 2.21 dBi CONCLUSION of simultaneous transmitter Both of the module 1 and module 2 can transmit simultaneously, the formula of calculated the MPE is: CPD1/LPD1+CPD2/LPD2+......etc. < 1 CPD = Calculation power density LPD = Limit of power density Therefore the worst-case situation is 0.0168 /1.00+0.0002 /1.00 = 0.0170, which is less than “1”, This confirmed that the device comply with FCC 1.1310 MPE limit. Measured power (dBm) Tune-up power (dBm) Max tune-up power (dBm) Antenna Gain Numeric Evaluation result (mW/cm2 ) Power density Limits (mW/cm2 ) -2.39 -4 to -2 -2 1.66 0.0002 1

No.：BCTC/RF-EMC-007 Page: 1 of 44 Edition：A.4 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2208115647-1E Applicant: Shenzhen Creality 3D Technology Co., Ltd. Product Name: 3D Printer Model/Type Reference: Sermoon D3 Tested Date: 2022-08-28 to 2022-09-05 Issued Date: 2022-09-27 Report No.: BCTC2208115647-1E No.：BCTC/RF-EMC-007 Page: 2 of 44 Edition：A.4 FCC ID: 2AXH6SERMOOND3 The test report is effective only with both signature and specialized stamp. This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen BCTC Testing Co., Ltd, this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. Product Name: 3D Printer Trademark: Model/Type Ref.: Sermoon D3 Prepared For: Shenzhen Creality 3D Technology Co., Ltd. Address: 18F, JinXiuHongDu Building, Meilong Blvd., Longhua Dist., Shenzhen,China 518131 Manufacturer: Shenzhen Creality 3D Technology Co., Ltd. Address: 18F, JinXiuHongDu Building, Meilong Blvd., Longhua Dist., Shenzhen,China 518131 Prepared By: Shenzhen BCTC Technology Co., Ltd. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Tangwei, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: 2022-08-26 Sample tested Date: 2022-08-28 to 2022-09-05 Report No.: BCTC2208115647-1E Test Standards: FCC Part15.247 ANSI C63.10-2013 Test Results: PASS Remark: This is Bluetooth BLE radio test report. Tested by: Approved by: Brave Zeng/ Project Handler Zero Zhou/Reviewer Report No.: BCTC2208115647-1E No.：BCTC/RF-EMC-007 Page: 3 of 44 Edition：A.4 Table of Content Test Report Declaration Page 1. Version .................................................................................................................. 5 2. Test Summary ....................................................................................................... 6 3. Measurement Uncertainty ..................................................................................... 7 4. Product Information And Test Setup ..................................................................... 8 4.1 Product Information ............................................................................................... 8 4.2 Test Setup Configuration ...................................................................................... 9 4.3 Support Equipment ............................................................................................... 9 4.4 Channel List ........................................................................................................ 10 4.5 Test Mode ........................................................................................................... 10 5. Test Facility And Test Instrument Used ............................................................... 11 5.1 Test Facility ......................................................................................................... 11 5.2 Test Instrument Used .......................................................................................... 11 6. Conducted Emissions .......................................................................................... 13 6.1 Block Diagram Of Test Setup .............................................................................. 13 6.2 Limit .................................................................................................................... 13 6.3 Test procedure .................................................................................................... 13 6.4 EUT Operating Conditions .................................................................................. 13 6.5 Test Result ............................................................................................................ 14 7. Radiated Emissions ............................................................................................. 16 7.1 Block Diagram Of Test Setup .............................................................................. 16 7.2 Limit .................................................................................................................... 17 7.3 Test procedure .................................................................................................... 18 7.4 EUT operating Conditions ................................................................................... 19 7.5 Test Result .......................................................................................................... 20 8. Radiated Band Emission Measurement and Restricted Bands Of Operation ...... 24 8.1 Block Diagram Of Test Setup .............................................................................. 24 8.2 Limit .................................................................................................................... 24 8.3 Test Procedure ................................................................................................... 25 8.4 EUT Operating Conditions .................................................................................. 25 8.5 Test Result .......................................................................................................... 26 9. Power Spectral Density Test ............................................................................... 27 9.1 Block Diagram Of Test Setup .............................................................................. 27 9.2 Limit .................................................................................................................... 27 9.3 Test procedure .................................................................................................... 27 9.4 EUT Operating Conditions .................................................................................. 27 9.5 Test Result .......................................................................................................... 2…

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No.：BCTC/RF-EMC-005 Page: 1 of 74 Edition：A.4 TEST REPORT Shenzhen BCTC Testing Co., Ltd. Report No.: BCTC2208115647-2E Applicant: Shenzhen Creality 3D Technology Co., Ltd. Product Name: 3D Printer Model/Type reference: Sermoon D3 Tested Date: 2022-08-28 to 2022-09-05 Issued Date: 2022-09-27 Report No.: BCTC2208115647-2E No.：BCTC/RF-EMC-005 Page: 2 of 74 Edition：A.4 FCC ID: 2AXH6SERMOOND3 The test report is effective only with both signature and specialized stamp. This result(s) shown in this report refer only to the sample(s) tested. Without written approval of Shenzhen BCTC Testing Co., Ltd, this report can’t be reproduced except in full. The tested sample(s) and the sample information are provided by the client. Product Name: 3D Printer Trademark: , Model/Type reference: Sermoon D3 Prepared For: Shenzhen Creality 3D Technology Co., Ltd. Address: 18F, JinXiuHongDu Building, Meilong Blvd., Longhua Dist., Shenzhen,China 518131 Manufacturer: Shenzhen Creality 3D Technology Co., Ltd. Address: 18F, JinXiuHongDu Building, Meilong Blvd., Longhua Dist., Shenzhen,China 518131 Prepared By: Shenzhen BCTC Testing Co., Ltd. Address: 1-2/F., Building B, Pengzhou Industrial Park, No.158, Fuyuan 1st Road, Tangwei, Fuhai Subdistrict, Bao'an District, Shenzhen, Guangdong, China Sample Received Date: 2022-08-26 Sample tested Date: 2022-08-28 to 2022-09-05 Report No.: BCTC2208115647-2E Test Standards: FCC Part15.247 ANSI C63.10-2013 Test Results: PASS Remark: This is WIFI-2.4GHz band radio test report. Tested by: Approved by: Brave Zeng/ Project Handler Zero Zhou/Reviewer Report No.: BCTC2208115647-2E No.：BCTC/RF-EMC-005 Page: 3 of 74 Edition：A.4 Table of Content Test Report Declaration Page 1. Version .................................................................................................................. 5 2. Test Summary ....................................................................................................... 6 3. Measurement Uncertainty ..................................................................................... 7 4. Product Information and Test Setup ...................................................................... 8 4.2 Test Setup Configuration ...................................................................................... 9 4.3 Support Equipment ............................................................................................... 9 4.4 Channel List ........................................................................................................ 10 4.5 Test Mode ........................................................................................................... 10 4.6 Table Of Parameters Of Text Software Setting ................................................... 11 5. Test Facility And Test Instrument Used ............................................................... 12 5.1 Test Facility ......................................................................................................... 12 5.2 Test Instrument Used .......................................................................................... 12 6. Conducted Emissions .......................................................................................... 14 6.1 Block Diagram Of Test Setup .............................................................................. 14 6.2 Limit .................................................................................................................... 14 6.3 Test procedure .................................................................................................... 14 6.4 EUT operating Conditions ................................................................................... 14 6.5 Test Result .......................................................................................................... 15 7. Radiated Emissions ............................................................................................. 17 7.1 Block Diagram Of Test Setup .............................................................................. 17 7.2 Limit .................................................................................................................... 18 7.3 Test procedure .................................................................................................... 19 7.4 EUT Operating Conditions .................................................................................. 20 7.5 Test Result .......................................................................................................... 20 8. Radiated Band Emission Measurement and Restricted Bands Of Operation ...... 27 8.1 Block Diagram Of Test Setup .............................................................................. 27 8.2 Limit .................................................................................................................... 27 8.3 Test procedure .................................................................................................... 28 8.4 EUT Operating Conditions .................................................................................. 28 8.5 Test Result .......................................................................................................... 29 9. Power Spectral Density Test ............................................................................... 31 9.1 Block Diagram Of Test Setup .............................................................................. 31 9.2 Limit .................................................................................................................... 31 9.3 Test procedure .................................................................................................... 31 9.4 EUT Operating Conditions .................................................................................. 31 9.5 Test Result .......................................................................................................... 32 10. -6dB …

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Part acceptance form Supplier: Shenzhen Lejin Radio Frequency Technology Co., LTD Material name: Bluetooth antenna Bom number: 3102070202 Specifications and Models: FPC antenna _L300_2.4G — Lejin antenna Supplier's Material number: LJF02-22030208B-R0A Application date: 2022-06-29 data  OK reliability OK  Department to sign： appearance OK size  OK  assembly  OK function OK  List of Acknowledgement 1. Function introduction and product specifications 2. Certificate of raw material /MSDS 3. Structural drawings 4. FAI full-size measurement report/attached self-evaluation 5. Reliability test report 6. SGS of raw materials shall be confirmed within the validity period of 1 year 7. Environmental Statement 8. Relevant certification certificates Note: The part acceptance letter shall include but not limited to the above information. If there are other requirements, it shall be supplemented, such as CPK report of part acceptance, process roadmap, QC engineering drawing, BOM, inspection specification on parts, product packaging specification, FMEA, etc. In addition, it is necessary to verify the supplier's manufacturing capability, quality control ability, and keep original records for the customer to acknowledge the supplier's parts. Shenzhen Lejin radio frequency technology Co., LTD Lejin radio frequency Proprietary & Confidential © 2017 Lejin radio frequency Corporation. All rights reserved. Add：Rm 301B,A4 Bld,Junfeng Innovation Park,Fuyong, Baoan Dist,Shenzhen. Tel:0755-27780515 Email:[email protected] 3.Product Specification A. Electrical Characteristics Frequency VSWR Efficiency Impedance Polarization Gain(2.4GHz) 2400MHz ~2500 MHz <2.0 ≥ 40% 50Ohm Linear ≤2.21dBi B. Material & Mechanical Characteristics Material of RadiatorFPC(White),LJWF28A Cable TypeΦ1.37mm,L300mm,Black Connector TypeIPX1 Dimension35.0*18.2mm C. Environmental Operation Temperature- 20 ̊C ~ + 70 ̊C Storage Temperature- 30 ̊C ~ + 85 ̊C Humidity40%~95% 4.Test Equipment & Conditions 1.Network AnalyzersAgilent 8753D/5071C 2.HSPA and LTE protocol test setR&S CMW500 -PT 3.Communications Test SetAgilent 8960 4.3D Chamber Test System Chart 1 Test topology ShenzhenLejinradiofrequencytechnologyCo.,LTD LejinradiofrequencyProprietary&Confidential©2017LejinradiofrequencyCorporation.Allrightsreserved. Add：Rm301B,A4Bld,JunfengInnovationPark,Fuyong,BaoanDist,Shenzhen.Tel:0755-27780515Email:[email protected] 5.TestReport 5.1VoltageStandingWaveRatio(VSWR). Chart2passivechart 5.2Efficientandgain. 5.3Radiationpattern. ShenzhenLejinradiofrequencytechnologyCo.,LTD LejinradiofrequencyProprietary&Confidential©2017LejinradiofrequencyCorporation.Allrightsreserved. Add：Rm301B,A4Bld,JunfengInnovationPark,Fuyong,BaoanDist,Shenzhen.Tel:0755-27780515Email:[email protected] 6. ReliabilityTest TestItemTestconditionEquipmentSpecificationResult 1 LowTemp. Storage Test Temperature:-30°C，Time:48hrs Testcondition:PlacingantennainaLow/High TemperatureChamber,keepthetempis25°Candhumidityis 65%foronehour,thenstep-downthetemp.to-30°Cinone hour,storeantennafor44hours;step-uptempto25°C,test antennaafter2hours. Temp.&Hum i. Tester Nomaterial deformationis allowed. Electronic Performanceis ok. PASS 2 High Temp./High Humid StorageTest Temperature:85°CHumidity:85%RHTime:48hrs Testcondition:PlacingantennainaLow/High TemperatureChamber,keepthetempis25°Candhumidityis 65%foronehour,thenstep-upthetemp.to80°Candthe humidityupto85%inonehour,storeantennafor44hours; step-downtempto25°C,testantennaafter2hours. Temp.&Hum i. Tester Nomaterial deformationis allowed. Electronic Performanceis ok. PASS 3 Salt-Spray6 prayTest PlacingantennaintheSalt-SprayTester,setthetest condition，Temp:35±2°CHumidity:85%NaClsaltspray:5 ±1%.PHvalue:6.5~7.2Testtime:24hours Salt-Spray Tester Nocolorchange Noappear rusting PASS Creality 3D A:25.0mm B:13.0mm Φ 1.3 7 coaxial cable,Gray, KCC-1 connector Remark: 1.FPC material:Electrolytic copper. 2.Backing in behind:3M300LSE. 3.Tolerance ： Cuting die:±0.1mm;Circuit on FPC:±0.05mm ； others are ±0.05mm. 4.ROHS:(Pb,Hg,Cr+6,PBBs,PBDEs),<1000ppm; Cd,<100ppm. 2.4G ANT C ： 30 0.0±3.0mm LJF02-2 2030208B -R0A 2.7 4.1 1.35 2.1 3.1

Part acceptance form Supplier: Shenzhen Lejin Radio Frequency Technology Co., LTD Material name: WIFI antenna Bom number: 3102070201 Specifications and Models: FPC antenna _L450_2.4G — Lejin antenna Supplier's Material number: LJF02-22030208A-R0A Application date: 2022-06-29 data  OK reliability OK  Department to sign： appearance OK size  OK  assembly  OK function OK  List of Acknowledgement 1. Function introduction and product specifications 2. Certificate of raw material /MSDS 3. Structural drawings 4. FAI full-size measurement report/attached self-evaluation 5. Reliability test report 6. SGS of raw materials shall be confirmed within the validity period of 1 year 7. Environmental Statement 8. Relevant certification certificates Note: The part acceptance letter shall include but not limited to the above information. If there are other requirements, it shall be supplemented, such as CPK report of part acceptance, process roadmap, QC engineering drawing, BOM, inspection specification on parts, product packaging specification, FMEA, etc. In addition, it is necessary to verify the supplier's manufacturing capability, quality control ability, and keep original records for the customer to acknowledge the supplier's parts. Shenzhen Lejin radio frequency technology Co., LTD Lej in rad io freq uen cyPropriet ar y & Confiden tial © 2017Lej in rad io freq uen cyCorporat ion. All rights reserved . Add：Rm 301B,A4 Bld,Junfeng In novation Park ,Fuyong, Baoan Dist,Shenzhen. Tel:0755-2 7780515 Email:phxcler@s zljrf .com 3.Product Specifi cati on A. Elect rica l Charact erist ics Fr equency VSWR Efficiency Impedan ce Polar izat ion Gai n(2.4GHz) 2400MHz ~2500 MHz <2.0 ≥ 35% 50Ohm Linear ≤2.27dBi B. Material & Mecha ni cal Cha racteristics Mat erial of Rad iat or Cab le Typ e Con nector Typ e Dimension C. Envi ronm ent al Operat ion Temperat ure- 20 ̊C ~ + 70 ̊C Stor ageTemperat ure- 30 ̊C ~ + 85 ̊C Humidity40% ~95% 4.Test Eq uipment & Conditi ons 1.N etwor k Ana lyzersAgi lent 8753D /5071C 2.H SPA and LTE pr ot oc ol test setR&S CMW500 -PT 3.C om muni cations Te st SetAgi lent 8960 4.3D Cha mbe r Te st System Chart 1 Test to pology FPC(White),LJWF28C Φ1.37mm,L450mm,Black IPX1 2 5.0*18.5mm ShenzhenLejinradiofrequencytechnologyCo.,LTD LejinradiofrequencyProprietary&Confidential©2017LejinradiofrequencyCorporation.Allrightsreserved. Add：Rm301B,A4Bld,JunfengInnovationPark,Fuyong,BaoanDist,Shenzhen.Tel:0755-27780515Email:[email protected] 5.TestReport 5.1VoltageStandingWaveRatio(VSWR). Chart2passivechart 5.2Efficientandgain. 5.3Radiationpattern. ShenzhenLejinradiofrequencytechnologyCo.,LTD LejinradiofrequencyProprietary&Confide…

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