Brand: WiindStone - Model: BT628 - Bluetooth V2.0 + EDR compatible with Bluetooth V1.2 - Voice dial and last number redial - Noise suppression and echo cancellation technology - Control the audio playback when used with Bluetooth stereo mobile phone or Bluetooth USB dongle - Built-in microphone and built-in stereo louder speaker - Built-in FM frequency transmitter connect to your car stereo (87.7 87.9 88.1 88.3 88.5 88.7 88.9MHz) - Universal audio input for audio devices - Working voltage: DC 12V - Packing List: - 1 x Rearview mirror - 1 x Car charger (190cm-Cable length) - 1 x Earphone (90cm) - 1 x Audio cable (100cm) - 1 x Fuse - 1 x English manual