MPOW Dolphin Smart Bluetooth 4.0 In-Car Speakerphone, Hands-Free Car Kit with NFC, Voice Commands, Motion Detection Auto on when motion detected and auto off 5 minutes after leaving the car. Intelligent answer to phone calls. When a call is in, simply answer it with voice &#34;Yes&#34; or ignore it with &#34;No&#34;. Hands free call answering maximizes your safety with no compromise of missing calls NFC fast connection. Fast connect with the NFC of your mobile phones (Put close for approx. 4 seconds, when in red and blue indicator, press the connect button on the phone The speakerphone can also connects with up to two mobile devices at a time and you can answer calls from two separate cell phones without disconnecting and pairing over and over again Built-in 500mah rechargeable battery. Voice Control activates your Android or Siri voice engine