2A5FA-EMM-02Electromagnetic Field Tester

Warning: 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. • Detects All Three Types of EMF Contamination: AC Magnetic, AC Electric, and RF/Microwave. • Special Frequency Weighting Mode: Measures electric current from EMF in the human body. • AC Magnetic Mode: Covers 40Hz-200kHz with a range of 0.1-99.9 milligauss (mG). • AC Electric Mode: Covers 40Hz-100kHz with a range of 1-999 volts per meter (V/m). • RF Mode: Covers 20MHz-6GHz with a range of 0.01-19.999 milliwatts per square meter (mW/m²). • Large-Size Liquid Crystal Display (LCD): Provides clear and accurate readings, suitable for use in low-light environments. • Audio Indicator: ounds to help pinpoint the source of EMF. • Peak Hold Function: Captures fast pulses; PEAK is only used for RF measurement. • Long Battery Life: Works for more than 10 hours with a 3.7V battery, and the low battery display shows the battery symbol. 1. Hold the Meter as Shown: Note: Do not cover the sensor on the top of the meter with your hand or other objects. Readings may be higher when the meter is held due to the electromagnetic field buildup by the body. To get an accurate reading, hold the bottom of the meter. 2. Toggle Between Measurement Modes: Use the button to switch between measurement modes. To turn off the meter, press and hold the button. The instrument will automatically shut down after 15 minutes of inactivity. 3. Measure Electromagnetic Fields: To measure the influence of electromagnetic fields on the human body (or any conductive body), use the "W-MAG" weighted mode button. For direct field strength measurements, use the standard "MAG" mode. RF mode can be used for any radio or microwave measurement application. 4. Display Readings: The bottom of the display shows the measurement value and unit. The peak measurement value range is displayed above the peak icon. 5. Audio Control: Press the audio button to turn off the audio. Press the audio button again to turn it on. 6. Brightness Adjustment: Adjusting the brightness is not supported. It is recommended to read the display in low-light environments for better clarity. 7. Battery Charging: When the battery symbol appears on the LCD screen, the battery power is low and needs to be charged. After fully charging, the battery will last for about 10 hours of continuous use. Charging takes about 1 hour with a 5V 1A charger or about 30 minutes with a 5V 2A charger. Reading the LCD: On-site measurements display digital measurements and units, located at the bottom of the LCD display. Accurate Reading: • Field measurements are averaged to provide the most stable, accurate reading possible. • The display shows a circular bar graph representing the maximum range, corresponding to the field percentage measurement on a logarithmic scale. • On-site percentage indicator scales show 0%, 10%, 20%, 50%, 100%, and 200% of full scale. • The field percentage indicator is displayed above the field measurement at the top of the LCD. Capture Peak: • During the test, press the "MAX" button to start the MAX function. • The MAX symbol will be displayed on the upper left of the meter value. • A peak value can be captured every 10 milliseconds (ms). Stable Readings: • Turn on the meter and place it in a fixed position. • The readings will stabilize after the meter is placed and fixed. 1. Power On/Off/Alarm: • Switch on and off: Long press the button to turn on, and long press again to turn off. • Note: The alarm is on by default. If you find the alarm sound too noisy, press this button to turn off the alarm. Press this button again to turn the alarm back on when you need a reminder. • If you do not want to use the meter, press and hold the button for a few seconds to turn it off. 2. ELEC (Electric Field Intensity) Standard Frequency Mode: • Press the "ELEC" button to select the electric field intensity mode. The meter will display the Standard Frequency Response and the V/M symbol. • The default measurement mode when powered on is the electric field strength mode. • The electric field strength measurement function is mainly used to measure the electromagnetic radiation emitted by electric wires, electric lights, wall sockets, electrical switches, and ungrounded appliances at a frequency of 40Hz-100kHz. • In a quiet home or office environment, the electric field strength should be less than 50V/M. 3. W-ELEC (Electric Field Strength) Weighted Frequency Mode: • Press the "W-ELEC" button to select the electric field weighted frequency mode. The meter will display the Weighted Frequency Response and the V/M symbol. • This function is mainly used to measure the electromagnetic radiation emitted by electric wires, electric lights, wall sockets, electrical switches, and ungrounded appliances. • The measurement frequency should be greater than 60 Hz. Higher frequencies produce more radiation damage in the body. For example, at 60 Hz, the body receives 60 electric field pulses per second, while at 120 Hz, the body receives 120 pulses per second. Although the electric field remains the same, the damage to the body is twice as great at 120 Hz. • In a quiet home or office environment, the electric field strength should be less than 50 V/M. 4. MAG (Magnetic Field Strength) Standard Frequency Mode: • Press the "MAG" button to select the magnetic field strength mode. The meter will display the Standard Frequency Response and the mG symbol. • This function is used to measure the magnetic field radiation emitted by electric motors, appliances, wires, and power lines. • The measurement frequency is 40-200 Hz and should be less than 4.0 mG in low magnetic field environments. 5. W-MAG (Magnetic Field Strength) Weighted Frequency Mode: • Press the "W-MAG" button to select the magnetic field weighted frequency mode. The me…

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Shenzhen LvYouYou Technology Co., Ltd Room 401, Building F, Zhenbao Industrial Zone Longhua Street, Longhua District, Shenzhen south of Heping Road, Jinglong Community China Date: July 5, 2024 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 FCC ID: 2A5FA-EMM-02 FRN: 0032047425 US Agent – Attestation Statement / Part 2.911(d)(7) Shenzhen LvYouYou Technology Co., Ltd. certifies, that as of [07/05/2024], we have designated FCC US Agent, LLC to accept service of process on our behalf for FCC ID: 2A5FA-EMM-02. Shenzhen LvYouYou Technology Co., Ltd., accepts to maintain an agent of service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. FCC US Agent, LLC, accepts as of the date of the filing of this application, the obligation of being the designated agent for the purpose of accepting service of process on behalf of Shenzhen LvYouYou Technology Co., Ltd. for FCC ID: 2A5FA-EMM-02. Designated Agent Information: Company Name: FCC US Agent, LLC FRN: 0033402884 Address: 3722 Illinois Avenue, Saint Charles, IL, 60174, USA Contact Person: Tim Payne Phone: 708-571-3148 Email: [email protected] Sincerely, Company: Shenzhen LvYouYou Technology Co., Ltd. Designated Agent: FCC US Agent, LLC Company Representative: Jin Hai Li Designated Agent Representative: Tim Payne Signature: Signature:

Shenzhen LvYouYou Technology Co., Ltd Covered Equipment Certification Attestation Letter 7/5/2024 Nemko North America, Inc. 303 River Road Ottawa K1V 1H2 Canada ATTN.: Reviewing Engineer FCC ID: 2A5FA-EMM-02 Shenzhen LvYouYou Technology Co., Ltd (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, the applicant should include an explanation on why the equipment is not “covered” equipment. Shenzhen LvYouYou Technology Co., Ltd (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing “covered” equipment. Signed: Printed name: Jin Hai Li Title: accountant Company Name: Shenzhen LvYouYou Technology Co., Ltd Date: 7/9/2024

Shenzhen LvYouYou Technology Co., Ltd 7/4/2024 Nemko North America, Inc. 303 River Road Ottawa, Ontario, Canada K1V 1H2 AUTHORITY TO ACT AS AGENT - FCC On our behalf, I appoint Shenzhen Alpha Product Testing Co., Ltd. Address: Building i, No.2, Lixin Road, Fuyong Street, Bao’an District, 518103, Shenzhen, Guangdong, China, to act as our agent in the preparation of this application for equipment certification. I certify that submitted documents properly describe the device or system for which equipment certification is sought. I also certify that each unit manufactured, imported or marketed, as defined in FCC regulations will have affixed to it a label identical to that submitted for approval with this application. In signing this letter, Applicant certifies that neither the applicant nor any party to the application is not subject to a denial of Federal benefits, that include FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. § 862 because of a conviction for possession or distribution of a controlled substance. See 47 CFR 1.2002(b) for the definition of a "party" for these purposes. For instances where our authorized agent signs the application for certification on our behalf, I acknowledge that all responsibility for complying with the terms and conditions for certification, as specified by Nemko North America Inc., still resides still resides with us. Sincerely, Printed name: Jin Hai Li

Differences Description We Shenzhen LvYouYou Technology Co., Ltd state: Product name: Electromagnetic Field Tester Model: EMM-01, EMM-02, EMM-03, EMM-04, EMM-05, EMM-06, EMM-07, EMM-08, EMM-09, EMM-10, GC01, GC02, GC03, GC04, GC05, GC06, GC07, GC08, GC09, GC10, FY8818, FY8818C, FY8819, FY8820, FY8821, FY8822, FY8823, FY8824, FY8827, FY876, SW201, SW202, SW203, SW204, SW205, SW206, SW207, SW208, SW209, SW210, SW211, SW212, SW213, SW214, SW215, SW216, SW217, SW218, SW219, SW220 All models of all models of PCB design, software, electric circuit, are consistent There is no difference between the models except the appearance color. 2024-7-9 Name Jin Hai Li Position accountant Company Name Shenzhen LvYouYou Technology Co., Ltd Address Room 401, Building F, Zhenbao Industrial Zone Longhua Street, Longhua District, Shenzhen south of Heping Road, Jinglong Community China Tel 13538218145 Fax 13538218145 Email [email protected] (Signature)

Shenzhen LvYouYou Technology Co., Ltd July 11, 2024 Nemko North America, Inc. 303 River Road Ottawa, Ontario, Canada K1V 1H2 REQUEST FOR CONFIDENTIALITY - FCC FCC ID: 2A5FA-EMM-02 Pursuant to Sections 0.457(d) and 0.459 of the Commission’s Rules and FCC Guidance document 726920, we hereby request permanent confidential treatment of exhibits identified as such in the table below and request they are permanently withheld from public review based on the documents containing trade secrets and proprietary information not customarily released to the public. The public disclosure of this information might be harmful to the applicant and provide unjustified benefits to its competitors. We also request short-term confidentiality on certain exhibits until the intended date of marketing as outlined below. We request the exhibits be withheld from public view for a period of insert number of days (cannot exceed 180 days) days. We attest marketing of the product will only commence after the period of short-term confidentiality expires, or if marketing is to commence before the requested number of days listed above, the grantee will inform Nemko to release the Short-Term Confidentiality information withheld on the FCC equipment authorization website. Exhibit Type of Confidentiality Requested Block Diagrams ☒ Permanent ☐ Short Term External Photos ------------------ ☐ Short Term Internal Photos ☐ Permanent* ☐ Short Term Operation Description ☒ Permanent ☐ Short Term Parts List & Placement/BOM ☒ Permanent ☐ Short Term Tune-Up Procedure ☐ Permanent ☐ Short Term Schematic Diagrams ☒ Permanent ☐ Short Term Test Setup Photos ------------------ ☐ Short Term User’s Manual ☐ Permanent* ☐ Short Term The asterisked items (*) require further information to be provided in this justification letter before permanent confidentiality will be extended to these exhibits. Please refer to FCC KDB 726920 D01 found at: https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=41731 and review section II, 3) regarding specific information that must accompany these requests. Note: any documents held under the Short-Term confidentiality will automatically become public after the requested time if an appropriate extension request has not been received. Any exhibits (i.e., schematic diagrams) that may have already been requested to have “Permanent” confidentiality as shown above need not be repeated under Short-Term confidentiality request. Sincerely, Signed: Printed name: Jin Hai Li Title: accountant Company Name: Shenzhen LvYouYou Technology Co., Ltd

FCC ID: 2A5FA-EMM-02 External FCC ID: 2A5FA-EMM-02 FCC ID: 2A5FA-EMM-02 FCC ID: 2A5FA-EMM-02 FCC ID: 2A5FA-EMM-02

4.5cm 2.5cm Label Location FCC ID: 2A5FA-EMM-02 Shenzhen LvYouYou Technology Co., Ltd Product name: Electromagnetic Field Tester Model No.: EMM-01 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.

FCC ID: 2A5FA-EMM-02 Internal FCC ID: 2A5FA-EMM-02 FCC ID: 2A5FA-EMM-02 FCC ID: 2A5FA-EMM-02 FCC ID: 2A5FA-EMM-02 FCC ID: 2A5FA-EMM-02 FCC ID: 2A5FA-EMM-02 FCC ID: 2A5FA-EMM-02

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E-mail: [email protected] Tel: 4008-3008-95 Website: http://www.a-lab.cn FCC TEST REPORT On Behalf of FCC ID: 2A5FA-EMM-02 Shenzhen LvYouYou Technology Co., Ltd Electromagnetic Field Tester Model No.: EMM-01, EMM-02, EMM-03, EMM-04, EMM-05, EMM-06, EMM-07, EMM-08, EMM-09, EMM-10, GC01, GC02, GC03, GC04, GC05, GC06, GC07, GC08, GC09, GC10, FY8818, FY8818C, FY8819, FY8820, FY8821, FY8822, FY8823, FY8824, FY8827, FY876, SW201, SW202, SW203, SW204, SW205, SW206, SW207, SW208, SW209, SW210, SW211, SW212, SW213, SW214, SW215, SW216, SW217, SW218, SW219, SW220 Prepared for : Shenzhen LvYouYou Technology Co., Ltd Address : Room 401, Building F, Zhenbao Industrial Zone Longhua Street, Longhua District, Shenzhen south of Heping Road, Jinglong Community China Prepared By : Shenzhen Alpha Product Testing Co., Ltd Address : Building i, No.2, Lixin Road, Fuyong Street, Bao'an District, 518103, Shenzhen, Guangdong, China Report Number : A2406226-C01-R01 Date of Receipt : July 1, 2024 Date of Test : July 1, 2024 - July 3, 2024 Date of Report : July 3, 2024 Version Number : V0 Test Result : Pass Page 2 of 29 Report No.: A2406226-C01-R01 TABLE OF CONTENTS Description Page 1 GENERAL INFORMATION ..................................................................................................................5 1.1 Description of Device (EUT) ....................................................................................................5 1.2 Ancillary equipment Details ....................................................................................................5 1.3 Test Lab information ................................................................................................................5 2 SUMMARY OF TEST ...........................................................................................................................6 2.1 Test Standard description: ......................................................................................................6 2.2 Summary of test .......................................................................................................................6 2.3 Test Mode Description .............................................................................................................6 2.4 Test Equipment .........................................................................................................................6 3 EMISSION TEST RESULTS (EMI) ......................................................................................................7 3.1 Conducted emissions on AC mains .......................................................................................7 3.1.1 E.U.T. Operation: ..........................................................................................................7 3.1.2 Test Setup Diagram: .....................................................................................................7 3.1.3 Test Result: ...................................................................................................................8 3.2 Radiated emissions (Below 1GHz) ...................................................................................... 10 3.2.1 E.U.T. Operation: ....................................................................................................... 10 3.2.2 Test Setup Diagram: .................................................................................................. 10 3.2.3 Test Result: ................................................................................................................. 11 3.3 Radiated emissions (Above 1GHz) ...................................................................................... 15 3.3.1 E.U.T. Operation: ....................................................................................................... 15 3.3.2 Test Setup Diagram: .................................................................................................. 15 3.3.3 Test Result: ................................................................................................................ 16 4 TEST SETUP PHOTOS .................................................................................................................... 17 5 EUT CONSTRUCTIONAL DETAILS (EUT PHOTOS) ..................................................................... 18 Page 3 of 29 Report No.: A2406226-C01-R01 TEST REPORT DECLARATION Applicant : Shenzhen LvYouYou Technology Co., Ltd Address : Room 401, Building F, Zhenbao Industrial Zone Longhua Street, Longhua District, Shenzhen south of Heping Road, Jinglong Community China Manufacturer : Shenzhen LvYouYou Technology Co., Ltd Address : Room 401, Building F, Zhenbao Industrial Zone Longhua Street, Longhua District, Shenzhen south of Heping Road, Jinglong Community China EUT Description : Electromagnetic Field Tester (A) Model No. : EMM-01, EMM-02, EMM-03, EMM-04, EMM-05, EMM-06, EMM- 07, EMM-08, EMM-09, EMM-10, GC01, GC02, GC03, GC04, GC05, GC06, GC07, GC08, GC09, GC10, FY8818, FY8818C, FY8819, FY8820, FY8821, FY8822, FY8823, FY8824, FY8827, FY876, SW201, SW202, SW203, SW204, SW205, SW206, SW207, SW208, SW209, SW210, SW211, SW212, SW213, SW214, SW215, SW216, SW217, SW218, SW219, SW220 (B) Trademark : N/A Measurement Standard Used: FCC PART 15:2021 (Part 15 Subpart B Class B, ANSI C63.4:2014) The device described above is tested by Shenzhen Alpha Product Testing Co., Ltd. to determine the maximum emission levels emanating from the device and the severe levels of the device can endure and its performance criterion. The test results are contained in this test report and Shenzhen Alpha Product Testing Co., Ltd. is assumed full responsibility for the accuracy and completeness of test. Also, this report shows that…

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FCC ID: 2A5FA-EMM-02 1.1. Photo of Radiated Emission test 1.2. Photo of Conducted Emission test