Supply of the call button on the headset B570 Bluetooth headset with a headset with FM band screen

The headset has the following characteristics: 1. Bluetooth: Bluetooth is suitable for any cell phone connection, the phone supports music playback, answer and call functions. 2. With bass: The headset supports multiple audio adjustment, so you can sound to the limit! Beyond in your imagination! 3, MP3 playback: You can insert TF card (cell phone memory card) to play music, it is possible without the need for mobile phones that can play music on headphones plug after a single memory card, pause, previous song down, volume control, etc. 4, Support FM FM: Radio reception function, you can switch channels. 5, support for mobile phones, computers wired connection: headset do not need to use battery power does not need to be wired with phone and computer connection, a standard 3.5mm plug mobile computers correct