B4 Bluetooth Wireless Headphone Foldable Stereo High Quality Sound Earphone Sport Headset Support TF Card FM Radio AUX Mode
- DC5V power supply [round hole interface] (computer USB port, mobile phone charger, car charger)
- compatible with Android, Apple, Microsoft, Symbian 99% mobile phones with Bluetooth function
- Bluetooth use frequency band: 2.4GHz andBluetooth distance: 10 meters without barriers
- Charging time is about 2 hours andTalk time is about 10-12 hours
- Music time is about 10-12 hours andBattery capacity 250MAH
