DR57 Gradient Bluetooth Headphones
- USB charging: type-c
- Signal to noise ratio: 88db
- Bluetooth link distance: 10 meters
- Output power: 35mW
- Bluetooth frequency: 2.401-2.480GHz
- Charging time: 4 hours
- Usage time: 6-8 hours
- Standby time: 18 hours
- Dynamic horn: 40mm
- Battery capacity: 300mah