Charging box with built-in 1500mAh. Can charge 32 times for one earphone, or recharge 16 times for two earphones synchronously Super simple pairing process. Remove the T2 bluetooth headphones from the charger, then connect via the phone’s menu via BluetoothAdvanced Bluetooth 5.1 with TWS technology. Backward compatible with BT4.2, BT4.1, BT4.0Features: Noise Cancelling, Surround Sound, With Charging Case, With Microphone, With TouchControls. Material : ABS Plastic Product Type : Earbud Type : TWS Compatibility : All Smartphones. Indicators Power indicator, Connection status indicator Controls Power On/Off, Play/Pause, Volume Up/Down, Answer /Reject CallLatest Bluetooth 5.1 Technology and Dual LED Display: True wireless earbuds Bluetooth 5.1 are equipped with the most advanced Bluetooth 5.1 chip, which provides more stable connection(15m), faster paring(just need 2 seconds ) and universal compatibility. Rid of cord, enjoy true wireless