Main functionPossible transmission and playback of music and GPS announcements; HD voice microphone - for clear voice transmission Talk time up to 8 hours (working time: about 22 hours), standby time up to 700 hours. Including USB cable, car charger, German instructions. No installation required - just clip on the sun visor. User Friendly You don't even have to press a button to turn the speaker on and off. It will automatically turn on when you enter (shock) and turn off again (standby) when you leave (Bluetooth connection disconnected for 180 seconds). Multipoint function You can connect two phones Bluetooth phones at the same time and easily answer incoming calls on both devices. Hassle-free pairing with almost any Bluetooth-enabled device. Easy Voice Control with School English Caller's phone number announces incoming call; With a "Yes" or "No", calls can be accepted or rejected. CLEAR CONVERSATIONS With built-in 2W speaker, echo and background noise reduction and volume control. Your calls are crystal clear wherever you are