D9X Detachable Battery TWS Stereo Bluetooth Headset V4.2 Wireless Earbuds
Bluetooth Resolution4.2Sensitivity-42dBFrequency range20-20000HzWorking voltage3.2V-4.2VDrive8mmCharge time45minutes for earphone, 1.5-2hours for charge caseBattery capacity38mAh/per pieceMusic timeon
- Model: D9X Detachable Battery TWS Stereo Bluetooth Headset V4.2 Wireless Earbuds