Professional Third-Party Electronic Product Inspection: Inspection Standards for Wireless Bluetooth Earbuds

For the inspection of wireless Bluetooth earbuds, we generally adopt the AQL standard (Acceptable Quality Limits) to define the degree of product defects and acceptable ranges.

Professional Third-Party Wireless Bluetooth Earbuds Inspection Company
Key Inspection Points for Inspectors at Wireless Bluetooth Earbuds Inspection Sites

Wireless Bluetooth Earbuds Inspection

1. Inspection Tools

2. Inspection Conditions

3. Appearance Check

4. On-Site General Item Testing

4.1 Barcode Scanning (Outer Carton Barcode)

4.2 Barcode Scanning (Sales Packaging Barcode)

4.3 Odor Check (Sales Packaging)

4.4 Odor Check (Product)

4.5 Product Dimensions and Weight

4.6 Coating Adhesion Test

4.7 Nameplate Friction Test

4.8 Battery Voltage Test

4.9 Internal Workmanship Test

5. Earbud Speaker Impedance Test

6. Earbud Speaker Sensitivity Test/Frequency Response Test

7. Earbud LED Indicator Test

8. Earbud Power On/Off Test

9. Earbud Pairing Test

10. Earbud Functionality Test

11. Earbud Call Quality Test

12. Earbud Wireless Range Test

13. Earbud Charging Function Test

14. Packaging and Component Check

4.8 Battery Voltage Test: Test the battery voltage and record the voltage data, which should generally not be less than the data specified in the manual.

4.9 Internal Workmanship Test: Reliability of grounding connections; effectiveness of power cord fixation; no cold soldering or poor solder joints; no loose components (switches, motors, controls, etc.); wire channels should be smooth with no sharp edges; no foreign objects inside.

5. Earbud Speaker Impedance Test

Measure the impedance of the left and right channels of the earbuds separately, typically 8-32 ohms, with the impedance on both sides being consistent.
6. Earbud Speaker Sensitivity Test/Frequency Response Test

Use a tester to check the sensitivity of the earbud speakers; the frequency response of the speakers should meet customer specifications.
7. Earbud LED Indicator Test

Check the response status of the indicators during power-on, power-off, pairing, incoming calls, calls, charging, and full charging separately, which should be consistent with the specifications provided by the customer.
8. Earbud Power On/Off Test

Press the multifunction button for more than 4 seconds, and the earbuds should power on/off automatically.
9. Earbud Pairing Test

Hold down the multifunction button to put the earbuds into pairing mode, and they should be able to pair with a Bluetooth phone.
10. Earbud Functionality Test

Test the earbud functions according to the manual, such as answering calls, volume adjustment, voice dialing, button functions, and smart sensing.
11. Earbud Call Quality Test

During calls, there should be no noise or echo, the earpiece should not have "distortion," and the earbuds should not noticeably heat up within 10 minutes of call time.
12. Earbud Wireless Range Test

After connecting to the phone, the earbuds should function normally within a distance of 33 feet/10 meters (or as per the manual).
13. Earbud Charging Function Test

Using the corresponding charger, the earbuds should charge normally with the indicator lights functioning properly and no heating of the device; after the specified charging time (e.g., 1.5 hours), the green light should illuminate (indicating full charge).
14. Packaging and Component Check

Colors, quantities, etc., on the packaging should match the product list;

Packaging dimensions should comply with packaging guidelines;

Color boxes/PVC bags should be undamaged;

Surface printing should be correct with no defects;

Manuals, warranty cards, etc., should not be missing or damaged.


Guangdong Huajian Inspection Co., Ltd. has prepared inspection processes for various products for a wide range of clients, with meticulous care and competitive pricing. Long-term cooperation is especially welcome! For more information, please follow Guangdong Huajian! www.hqcinspection.com