2A9G2-MS8Mesh Network Communication Intercom System

Shenzhen EJEAS Intelligent Technology Co., Ltd. Dec,30, 2022 Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Subject: Explanation of differences between product types FCC ID : 2A9G2-MS8 Model Number: MS8, MS2, MS4, MS6, MS10, MS20, MS30, MS40 To Whom It May Concern: We, The Shenzhen EJEAS Intelligent Technology Co., Ltd. hereby declare that the models are identical except the model name. Except for the different above, no other modification is performed. Sincerely, Signature: Shenzhen EJEAS Intelligent Technology Co., Ltd. Contact person: Cheng Wu

Shenzhen EJEAS Intelligent Technology Co., Ltd. Agent Authorization Company: Shenzhen EJEAS Intelligent Technology Co., Ltd. Address: Room 3A, B 1, Zhonxin road 9, Taoyuan Community, Dalang street, Longhua distrcit, Shenzhen city, Guangdong province, China. Product Name: Mesh Network Communication Intercom System Model Number(s): MS8, MS2, MS4, MS6, MS10, MS20, MS30, MS40 Product Description: Mesh Network Communication Intercom System 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: 2022-12-30 Name: Cheng Wu Company: Shenzhen EJEAS Intelligent Technology Co., Ltd.

Shenzhen EJEAS Intelligent Technology Co., Ltd. Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2022-12-27 Subject; Request for Confidentiality FCC ID: 2A9G2-MS8 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 Parts List Operational Description Tune-up Procedure 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); External Photos Test Setup Photos Internal Photos User Manual For 45 days, pursuant to Public Notice DA 04-1705. OR For 180 days pursuant to 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 Shenzhen EJEAS Intelligent Technology Co., Ltd. Contact person: Cheng Wu

Report No.: AGC00749221001AP03 Page 1 of 4 EXTERNAL PHOTOS ALL VIEW OF EUT TOP VIEW OF EUT Report No.: AGC00749221001AP03 Page 2 of 4 BOTTOM VIEW OF EUT FRONT VIEW OF EUT Report No.: AGC00749221001AP03 Page 3 of 4 BACK VIEW OF EUT LEFT VIEW OF EUT Report No.: AGC00749221001AP03 Page 4 of 4 RIGHT VIEW OF EUT PORT VIEW OF EUT ****************************************End of Report****************************************

FCC ID Label Location 20mm&20mm FCC ID: 2A9G2-MS8

Report No.: AGC00749221001AP03 Page 1 of 5 INTERNAL PHOTOS OPEN VIEW OF EUT (FIGURE 1) OPEN VIEW OF EUT (FIGURE 2) Report No.: AGC00749221001AP03 Page 2 of 5 BATTERY VIEW OF EUT INTERNAL VIEW OF EUT (FIGURE 1) Report No.: AGC00749221001AP03 Page 3 of 5 INTERNAL VIEW OF EUT (FIGURE 2) INTERNAL VIEW OF EUT (FIGURE 3) Report No.: AGC00749221001AP03 Page 4 of 5 INTERNAL VIEW OF EUT (FIGURE 4) ANTENNA CLOSE-UP PHOTO-1 BT Antenna Report No.: AGC00749221001AP03 Page 5 of 5 ANTENNA CLOSE-UP PHOTO-2 ****************************************End of Report**************************************** Microphones Antenna

RF EXPOSURE EVALUATION 1. PRODUCT INFORMATION Product Description Mesh Network Communication Intercom System Model Name MS8 Series Model MS2, MS4, MS6, MS10, MS20, MS30, MS40 FCC ID 2A9G2-MS8 2. EVALUATION METHOD According to 447498 D01 General RF Exposure Guidance v06 The 1-g and 10-g SAR test exclusion thresholds for 100 MHz to 6 GHz at test separation distances ≤ 50 mm are determined by: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)] ·[√f(GHz)] ≤ 3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. Where f(GHz) is the RF channel transmit frequency in GHz Power and distance are rounded to the nearest mW and mm before calculation 3. CALCULATION BT: P t =6.970dBm=4.98mW The value of the Maximum output power P t is referred to the test report of the CFR47 §15.247. The result for RF exposure evaluation SAR=(4.98mW /5mm) .[√2.402GHz)]=1.54<3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. Microphones: Pt=4.825dBm=3.037mW The result for RF exposure evaluation SAR=(3.037mW /5mm) .[√0.471(GHz)]= 0.417<3.0 for 1-g SAR and ≤ 7.5 for 10-g extremity SAR. 4. CONCLUSION The SAR evaluation is not required.

SPECIFICATIONFORAPPROVAL CustomerName: 爱骑仕 ProductName: AntennaDescription ： 480MHz0.81BlackcableL=52mm CustomerP/N: CYANHEP/N: H007A01C00180 Date:2022-12-23Vesion:A1 MANUFACTURERSIGNATURECUSTOMERSIGNATURE CHECKEDBY: YAOJI AUDITORBY: JUN APPROVEDBY: LIANG DATE: 2022-12-23 Suppliername ： DongguanQingheElectronicTechnologyCo.,LTD Trademark ： CYANHE NumberEffectivedateChangerecord V1.02022-12-23 Initialrelease 1.ProductPhoto： 2.Productfeatures： a.PeakGain480MHz0.82dBi b.Efficiencyishigh c.Assemblyissimple 3.Maintechnicalspecifications： Maintechnicalspecifications FrequencyRange(MHZ)480 Impedance(Ω) 50±10 Gain(dBi)0.82 Efficiency(％)46.31 ReTurnLoss(dB)≤-9.5 VSWR≤2.0 AdmittedPower1W Polarization Linear,Vertical Radiation Omni-directional 4.ElectricalSpecification: ThosespecificationswerespeciallydefinedfortestStreammodel. 5.VSWR 5.1MeasuringMethod 1.A50Ωcoaxialcableisconnectedtotheantenna.Thenthiscableisconnected toanetworkanalyzertomeasuretheVSWR 2.Keepingthisjigawayfrommetalatleast20cm 5.2MeasurementfrequencypointsandVSWRvalue ConnectorTypeCable PhysicalProperties OperatingTemp-20°C~+60°C StorageTemp-20°C~+70°C 6.AnechoicChamber Introduction: Microwavedarkroomandnoreflectionchamber,absorbingshortwavedarkroom darkroom.Microwavedarkroombyelectromagneticshieldingroom,filtering andisolation,groundingdevice,theventilationduct,indoordistributionsystem, monitoringsystem,ceilingwavematerialpart.Itisbasedonthewaveabsorbing materialastheliningoftheshieldroom,itcanabsorbthemostofthe electromagneticenergyintothesixwallisabettersimulationofthefreespace conditions. Themainworkingprincipleofmicrowaveanechoicchamberisaccordingtothe electromagneticwaveinthemediumfromthelowmagneticguidemagnetic directionofpropagationrules,absorbingmaterialstoguidetheelectromagnetic waveusinghighpermeability,throughresonance,asubstantialabsorptionof electromagneticwaveradiationenergy,bycouplingtheelectromagneticenergy intoheatenergy. Mainperformance： Frequencyrange:400MHz~6GHzceilingreflectedwavelossmaterials:400MHz~ 6GHzisequaltoormorethan15dB(microwaveabsorbingmaterialbycompositewave absorbingmaterials,namelytaperedcontainingcarbonspongesuctionwavematerial pasteinferrite) 7.2D、3DRaditationPattern 480MHz Gain/Efficiency FreqEffiGain (MHz)(%)(dBi) 47045.630.23 48046.290.82 49046.310.35 8.AntennaDimensions 9.ROHS: AntennaH007A01C00180meetsRoHS2.0requirements. ***************************END****************************

Page 1 of 36 FCC Test Report Report No.: AGC00749221001FE04 FCC ID : 2A9G2-MS8 APPLICATION PURPOSE : Original Equipment PRODUCT DESIGNATION : Mesh Network Communication Intercom System BRAND NAME : EJEAS MODEL NAME : MS8, MS2, MS4, MS6, MS10, MS20, MS30, MS40 APPLICANT : Shenzhen EJEAS Intelligent Technology Co., Ltd. DATE OF ISSUE : Dec. 13, 2022 STANDARD(S) : FCC Part 15.236 REPORT VERSION : V1.0 Attestation of Global Compliance (Shenzhen) Co., Ltd Report No.: AGC00749221001FE04 Page 2 of 36 Report Revise Record Report Version Revise Time Issued Date Valid Version Notes V1.0 / Dec. 13, 2022 Valid Initial Release Report No.: AGC00749221001FE04 Page 3 of 36 TABLE OF CONTENTS 1. VERIFICATION OF CONFORMITY .................................................................................................................. 5 2. GENERAL INFORMATION .............................................................................................................................. 6 2.1. PRODUCT DESCRIPTION ........................................................................................................................ 6 2.2. TEST METHODOLOGY ............................................................................................................................. 8 2.3. SPECIAL ACCESSORIES ......................................................................................................................... 8 2.4. EQUIPMENT MODIFICATIONS ................................................................................................................ 8 2.5. ANTENNA REQUIREMENT....................................................................................................................... 8 3. MEASUREMENT UNCERTAINTY ................................................................................................................... 9 4. DESCRIPTION OF TEST MODES ................................................................................................................. 10 5. SYSTEM TEST CONFIGURATION ................................................................................................................. 11 5.1. CONFIGURATION OF EUT SYSTEM ....................................................................................................... 11 5.2 EQUIPMENT USED IN TESTED SYSTEM ................................................................................................ 11 5.3. SUMMARY OF TEST RESULTS ............................................................................................................... 11 6. TEST FACILITY .............................................................................................................................................. 12 7. OUPUT POWER ............................................................................................................................................. 13 7.1. TEST LIMIT .............................................................................................................................................. 13 7.2. MEASUREMENT PROCEDURE ............................................................................................................. 13 7.3. TEST SETUP............................................................................................................................................ 14 7.4. TEST RESULT .......................................................................................................................................... 15 8. OCCUPIED BANDWIDTH .............................................................................................................................. 16 8.1. TEST LIMIT .............................................................................................................................................. 16 8.2. MEASUREMENT PROCEDURE ............................................................................................................. 16 8.3. TEST SET-UP........................................................................................................................................... 16 8.4. MEASUREMENT RESULTS .................................................................................................................... 16 9. FREQUENCY STABILITY .............................................................................................................................. 19 9.1. TEST LIMIT .............................................................................................................................................. 19 9.2. MEASUREMENT PROCEDURE ............................................................................................................. 19 9.3. TEST SET-UP........................................................................................................................................... 19 9.4. TEST RESULT .......................................................................................................................................... 20 10. EMISSIONS WITHIN THE BAND AND OUTSIDE THE BAND ................................................................... 22 Report No.: AGC00749221001FE04 Page 4 of 36 10.1. TEST LIMIT ............................................................................................................................................ 22 10.2. MEASUREMENT PROCEDURE ........................................................................................................... 22 10.3. TEST SETUP ......................................................................................................................................... 23 10.4. TEST RESULT........................................................................................................................................ 24 11. LINE CONDUCTED EMISSION TEST ......................................................................................................... 34 11.1. LIMITS OF LINE CONDU…

Text truncated - open the document above for the full version.

Report No.: AGC00749221001AP02 Page 1 of 2 TEST SETUP PHOTOS RADIATED EMISSION TEST SETUP BELOW 1GHz RADIATED EMISSION TEST SETUP ABOVE 1GHz Report No.: AGC00749221001AP02 Page 2 of 2 RF CONDUCTED TEST SETUP (BT) RF CONDUCTED TEST SETUP (Microphones) ****************************************End of Report*************************************