Wireless FM, Aux, Memory Card, Bluetooth Supported P47 Headphones Wireless FM Radio, Aux, Memory Card, Bluetooth Supported Headphones P47Firstly, you should make it memorize by scanning the channel for the FM radio. Switch to radio mode by pressing the "M" button. Hold down the "Play/pause" button for 2-3 seconds and release it. Wait for about 1 minute, when the scanning is complete, you can switch between the channels with the left-right buttons. Portable sports headphones can be used on any device that supports bluetooth and 3.5mm jack aux input such as mobile phone, computer, tablet.