☆　V1.2 Version ☆　Frequency band:2.4 GHz-2.483GHz 1SM Band ☆　Talking time: Up to 6 hours ☆　Standby time:Up to 150hours ☆　Operating Distance:10meters(class 2) ☆　Charging time: Within 3 hours ☆　DSP: Full duplex transmission,noise suppression and echo cancellation. ☆　Signal-to Noise:> 60dB with 15bit sound effect decode. ☆　Bluetooth Profile Support: Excellent compatibility with bluetooth enabled devices,including mobile phone,PC,PDA,printer and etc. from many different manufactories. ☆　Certification: CE,FCC.BQB