Mpow Knight Pro Wireless Bluetooth 4.0 Headset Headphone with in-car Charging Dock Support Voice Command Multi-Point Technology Easy your call, just pick up to automatically connect and answer a call. Put in dock to trigger sleep mode. Enjoy clear conversations on both ends of the call with Active Noise cancellation.Built in latest CSR intelligent noise reduction chip, improve the call quality, make your calls more clear. Integrated Multi-point technology lets you connect two devices at once, and support Siri voice command. Support In-car dock Charging and USB charging at home or office Easy to pair: just press one key to pair your Bluetooth devices