Wireless earphone - Charm Fit black color

Wireless Bluetooth sound headphones Bluetooth version: BK3266 V5.0 frequency range: 2.4 GHz - 2.4 GHz operating distance: 10 meters battery capacity: 3.7 volts / 100 milliamp * 2 talk time: about 15 hours charging: USB Micro port frequency: 20-20 kHz