This product can be directly connected to speakers, with power amplifier and functions. Support MP3 / USB / / Line in / FM / wireless / DC 5V. Fine workmanship and creative appearance ensure its popularity and practicality. Features - Color: Black. - Size: 8.50X3.30X3.20cm/3.34X1.30X1.26 inch. - Material: Plastic. - Power amplifier: 2 x 3W. - Radio FM frequency band: 87.5MHZ-108.0MHZ - Remote controlled distance: 5-10M. - Voltage: DC 5V. - VOL-: Short press is the last song; Long press is the volume reduction. - Play/pause: Short press is the between pause and playback; Long press is the radio FM automatic station. - VOL+: Short press is to choose the next song; Long press is to increase the volume. - MODE: Switching of USB/ /FM/AUX/wireless function. - It is manufactured with professional technology to ensure the of the product and can work for a long time. Package list: 1 x Board (with Cable)