2A7DF-904DGLaser level

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: -- Reorient or relocate the receiving antenna. -- Increase the separation between the equipment and receiver. -- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. -- Consult the dealer or an experienced radio/TV technician for help. The device has been evaluated to meet general RF exposure requirement. The device can be u sed in portable exposure condition without restriction

CHANGZHOU MIDEKER OPTOELECTRONIC TECHNOLOGY CO.,LTD Agent Authorization Company: CHANGZHOU MIDEKER OPTOELECTRONIC TECHNOLOGY CO.,LTD Ltd.Address: C-2, Building 5,New Power Venture Center No.1 Qingyang North Road, Tianning District,Changzhou,Jiangsu Province,China Product Name: Laser level Model Number(s): 904DG 904,904D,904DR,HP-904DG,HP-904DR,HP-904D,HP-904, LW-904DG,LW-904DR,LW-904D,LW-904,903D,903DG,903DR,SC-L12, LL 16go,LL 12go,903DCG, 903DCR,NIV30360R,NIV30360G,NIV30360V Product Description: Laser level 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: 2022-06-13 Name: Guan Lili Title: Manager Company: CHANGZHOU MIDEKER OPTOELECTRONIC TECHNOLOGY CO.,LTD

CHANGZHOU MIDEKER OPTOELECTRONIC TECHNOLOGY CO.,LTD Office of Engineering Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 2022/06/10 Subject; Request for Confidentiality FCC ID: 2A7DF-904DG 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: Guan Lili Title: Manager

CHANGZHOU MIDEKER OPTOELECTRONIC TECHNOLOGY CO.,LTD Model Difference Data：2022.06.13  Product description: Laser level Model name: 904DG， 904,904D,904DR,HP-904DG,HP-904DR,HP-904D,HP-904, LW-904DG,LW-904DR,LW-904D,LW-904,903D,903DG,903DR,SC-L12, LL 16go,LL 12go,903DCG, 903DCR,NIV30360R,NIV30360G,NIV30360V Trade Name: N/A FCC ID: 2A7DF-904DG All the model are the same circuit and RF module, except model names . Regards Sincerely Client’s signature : Client’s name / title : Guan Lili（Manager） Contact information / address：C-2, Building 5,New Power Venture Center No.1 Qingyang North Road,Tianning District,Changzhou,Jiangsu Province,China

External Photos

Model: 904DG FCC ID: 2A7DF-904DG Label Location

Internal Photos ANT

Shenzhen CTB Testing Technology Co., Ltd. Report No.: CTB220609005RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 1 of 27 TEST REPORT Compiled by: Reviewed by: Approved by: Chen Zheng Arron Liu Bin Mei / Director 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 CTB Testing Technology 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: Laser level FCC ID: Trademark: Model Number: Prepared For: Address: Manufacturer: Address: Prepared By: Address: 2A7DF-904DG N/A 904DG, 904, 904D, 904DR, HP-904DG, HP-904DR, HP-904D, HP-904, LW-904DG, LW-904DR, LW-904D, LW-904, 903D, 903DG, 903DR, SC-L12, LL 16go, LL 12go, 903DCG, 903DCR, NIV30360R, NIV30360G, NIV30360V CHANGZHOU MIDEKER OPTOELECTRONIC TECHNOLOGY CO.,LTD C-2, Building 5, New Power Venture Center No.1 Qingyang North Road, Tianning District, Changzhou, Jiangsu Province, China CHANGZHOU MIDEKER OPTOELECTRONIC TECHNOLOGY CO.,LTD C-2, Building 5, New Power Venture Center No.1 Qingyang North Road, Tianning District, Changzhou, Jiangsu Province, China Shenzhen CTB Testing Technology Co., Ltd. Floor 1&2, Building A, No. 26 of Xinhe Road, Xinqiao Community, Xinqiao Street, Baoan District, Shenzhen, Guangdong China Sample Received Date: May. 26, 2022 Sample tested Date: May. 26, 2022 to Jun. 09, 2022 Issue Date: Jun. 09, 2022 Report No.: CTB220609005RFX Test Standards FCC Part15.231 ANSI C63.10:2013 Test Results PASS Remark: This is 433MHz radio test report. Shenzhen CTB Testing Technology Co., Ltd. Report No.:CTB220609005RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 2 of 27 TABLE OF CONTENT Test Report Declaration Page 1. VERSION............................................................ 3 2. TEST SUMMARY ..................................................... 4 3. MEASUREMENT UNCERTAINTY ....................................... 5 4. PRODUCT INFORMATION AND TEST SETUP ........................... 6 4.1 Product Information ..................................................... 6 4.2 Test Setup Configuration ................................................ 6 4.3 Support Equipment ..................................................... 6 4.4 Test Mode ............................................................. 7 4.5 Test Environment ....................................................... 7 5. TEST FACILITY AND TEST INSTRUMENT USED ......................... 8 5.1 Test Facility ............................................................ 8 5.2 Test Instrument Used ................................................... 8 6. AC POWER LINE CONDUCTED EMISSION .............................. 10 6.1 Block Diagram Of Test Setup............................................ 10 6.2 Limit ................................................................. 10 6.3 Test procedure ........................................................ 10 6.4 Test Result ........................................................... 12 7. RADIATED EMISSION ............................................... 13 7.1 Block Diagram Of Test Setup............................................ 13 7.2 Limit ................................................................. 13 7.3 Test procedure ........................................................ 14 7.4 Test Result ........................................................... 15 8. DWELL TIME ....................................................... 20 8.1 Block Diagram Of Test Setup............................................ 20 8.2 Limit ................................................................. 20 8.3 Test procedure ........................................................ 20 8.4 Test Result ........................................................... 21 9. OCCUPIED BANDWIDTH ............................................. 22 9.1 Block Diagram Of Test Setup............................................ 22 9.2 Limit ................................................................. 22 9.3 Test procedure ........................................................ 22 9.4 Test Result ........................................................... 23 10. ANTENNA REQUIREMENT ........................................... 24 11. EUT PHOTOGRAPHS ................................................ 25 12. EUT TEST SETUP PHOTOGRAPHS ................................... 26 (Note: N/A means not applicable) Shenzhen CTB Testing Technology Co., Ltd. Report No.:CTB220609005RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 3 of 27 1. VERSION Report No. Issue Date Description Approved CTB220609005RFX Jun. 09, 2022 Original Valid Shenzhen CTB Testing Technology Co., Ltd. Report No.:CTB220609005RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 4 of 27 2. TEST SUMMARY The Product has been tested according to the following specifications: Test Item Test Requirement Test method Result AC Power Line Conducted Emission 47 CFR Part 15 Subpart C Section 15.207 ANSI C63.10-2013 N/A Radiated Emission 47 CFR Part 15 Subpart C Section 15.209; 15.231(b) ANSI C63.10-2013 PASS Dwell Time 47 CFR Part 15 Subpart C Section 15.231 (a) ANSI C63.10-2013 PASS Occupied Bandwidth 47 CFR Part 15 Subpart C Section 15.231(c) ANSI C63.10-2013 PASS Antenna requirement 47 CFR Part 15 Subpart C Section 15.203 ANSI C63.10-2013 PASS Note:N/A is test does not applicable since deivce is powered by battery. Shenzhen CTB Testing Technology Co., Ltd. Report No.:CTB220609005RFX Report Tel: 4008-707-283 Web: http://www.ctb-lab.net Page 5 of 27 3. MEASUREMENT UNCERTAINTY Where relevant, the following measurement uncertainty levels have been estimated for tests performed on the Product as specified in CISPR 16-4-2. This uncertainty represents an expanded uncertainty expressed at approximately the 95% confidence level using a coverage factor of k=2. Ite…

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Radiated Emission Below 1G Above 1GHz