Features:
1. Bluetooth version: luoda V4.2
2. Support protocol: A2DP HSP HFP Aptx ACRCP
3. Battery capacity: 35mAh
4. Life time: 2H
5. Standby time: 45H
6. Long charging time: 2H (battery box)
7. Charging voltage: 5V
8. Frequency range: 20 ~ 20KHZ
9. Waterproof grade: IPX4
Package Include:
1. 1 syllable d9 wireless bluetooth headphone
2. 1 usb charging cable
3. 2 pairs eartips
4. user manual