Metallica Bluetooth Speaker with NFC near Field Communication enabled which gives you a quick connect to your device. A small pucker-shaped speaker Gold or Silver body and controls right on the top for easy play. The sound quality is in Full HD stereo that can fill up a room 20x 20 ft. Built in high capacity battery that will last for 10 hours of play and can also answer phone calls with built in mic.It can also function as an MP3 player that can read music from a SD card. A perfect companion will connect to your phone or tablet with in seconds and allow you to play your music almost instantly. Save battery on your phone or tablet by playing music on this speaker and only connecting via Bluetooth from your device.Bluetooth 4.01 or higher enabled with NFC communication.Built-in rechargeable Lithium ion battery can give you up to 10 hours of play time.Built in Mic which has background noise cancellation built in.MP3 Player by using SD card slot.Metallic colors Gold and Silver.Light Weight and easy to carry comes with charging cable.