Product features: 1) Auto pick up mode， 2) Voice control: a pick up or reject phone call 3) the Bluetooth V4.0 A2DP 4) Easy installation， Sun visor clip 5) Can connect to two cell phones simultaneously 6) Professional /ODM service， print LOGO to the product or packaging， Function characteristics: 1， the latest bluetooth version (CSR) : V4.0 + A2DP， compatible with most of bluetooth mobile phone. 2， working frequency range: ISM frequency band (2.402 ~ 2.480 GHZ) 3， a wireless connection range up to 10 meters 4， support Hands - Free， Headset， A2DP， AVRCP bluetooth protocol specification， etc 5， support， connecting the two phones at the same time， up to eight pairing bluetooth phone memory. (unique technology can support both phones connected online standby) 6， built-in DSP function of noise reduction and echo cancellation (special noise reduction processing let you open the window under 120 yards high speed can also clear on the phone!) 7， 2 w speakers， equipped with high fidelity and high sensitivity microphone 8， support stereo music playing 9， boot automatically connected， super convenient， easy life Number 10， to the telegraph， the operation has the voice prompt， clear， simple and easy to use 11， talk time: 15 ~ 16 hours Standby time: 1600 hours Charging time: 2 ~ 3 hours 12， size: 98 mm (length) x 56 mm (width) x 18 mm (high)