Specification: 100% brand new and high quality 2 colors for your choice: Black White Bluetooth Version: V4.0 Transmission Distance: 10M Talking Time: ≥3-5 hours Standby Time: ≥100 hours Support Stereo: YES Applicable models: compatible with all major brand Bluetooth mobile phone as a hands-free use, with a Bluetooth adapter, can be used for online voice chat Voice Commands. Custom mobile charging cradle/carrying case. Extended battery life. High-fidelity sound and voice quality effect Supports Bluetooth: Headset Profile, Hands-free Profile(DSP technology) Support Bluetooth stereo music playback Bluetooth 4.0 version, can be simple pairing safely Can be casual talk while driving/working or walking Power source: Built In Rechargeable Battery