Item NO. HF-88A Bluetooth Rearview Mirror Hands Free Car Kit Features: Super bright LED display panel for incoming call indication. (12 Digit Caller ID) Bluetooth specification:2.0 Full Two Ways (Duplex) Conversation Digital Noise & Echo Suppression System ( DSP technology) Using Car Speaker by 4 pre FM Radio Frequencies Wireless head , convenient for private conversation at anytime Built-in microphone and loudspeaker Voice recorder and playback Voice dialing and Redialing Calling waiting and Reject call function enable Volume Control Directional High Sensitive Microphone Automatic Bluetooth Re-connection High capacity rechargeable Lithium battery with longest consumption time USB socket forsoftware framework Package: Bluetooth Rearview Mirror Wireless Earpiece Cigarette Light Charger User Manual in English Packing Box