Multifunctional key High quality microphone on the Banyan Spy invisible ear bud to hear voice clearly Hands-free cell phone communication device. Voice dialing available Battery time:- 6 hours talking time and 60 hours of standby mode Built-in chargeable battery Very attractive look.0 Easy to operate Bluetooth password is “0000” This can be connect through any cell phone which have Bluetooth function Bluetooth hands free T9.