Unit Features: Universal bluetooth handsfree car kit for all kind of bluetooth phone.(Compatible with all kinds of GSM / CDMA / TDMA / WCDMA Bluetooth phones.)Voice Announcing for Incoming Phone NumberChangeable ring tones. (3 Ring Sound Options + 1 Voice)Digital noise & echo suppression system.Full two ways (Duplex) conversation.High powered amplifier and speaker.Directional high sensitive microphone.Voice dialling, redial and audio transfer function.Automatic re-connection.Easy set up and simple operation.Provides the best sound clarity with little or no distortion. (Superior sound quality)Surge prevention circuitAlternative Power ConnectionRemote controller function:Talk button : Used for accept, end, reject, redial, voice dialling.Volume (+) button : For pairing standby mode and increasing the speaker volume.Volume (-) button : For ring tone change and decreasing the speaker volume.Green LED light : For indication of Bluetooth link status. Green LED light flashin : Bluetooth pairing.Red LED light : For indication of the Handsfree device operationDetails on what included with your Bluetooth HandsFree Car Kit