REMAX TWS-48 Ruiliang Ultra-Thin Metal True Wireless Stereo Music Headset

Wireless version: V5.2
2. Transmission distance: 15m
3. Drive unit: 13mm
4. Frequency response: 20-20000Hz
5. Impedance: 32 Ohm
6. Rated power: 3mW
7. Battery capacity of charging compartment: 300 mA
8. Headphone battery capacity: 25 mA
9. Play time: 6-8 hours
10. Charging time: 1.5 hours
11. Standby time: 300H