Compatible with most of the cellphone with Bluetooth; It will automatically power on as car start up; Wireless installation directly clip to car sunvisor plug and play; Supports Chinese / English / Spanish voice prompt convenient to use; Bluetooth hands-free receive hang up or reject; Supports voice communication call return and re-dial the last phone number; Built-in microphone and stereo speaker; Replaceable lithium battery supports 8 hours calling and 80 hours standby; Supports pairing to two phones and standby simultaneously; Automatically connect to paired cellphone