MP3 player + FM radio + Security alarm system + Wireless remote+ Audio Amplifier.Features:Support SD/MMC card or USB Drive to play music.Support FM radio.Security alarm system. Anti-theft security alert.With high sensitivity wireless remote control.Specifications:Compatiable with: for motorcycleLoudspeaker color: red， black(optional)Voltage: DC12VPower output: 2 * 10WStandby current: ��0.01ASupporting format: MP3Supporting device:SD/MMC cardFM radio range: 88Hz-108HzOperating frequency range: 100HZ~6KHz (315Hz，+/-0.5dB)Working temperature:0-60��Remote control distance: ��100mHost size: 7.8 * 6.3 * 2.3cm / 3.1 * 2.5 * 0.9inRemote controller dimension: 5.7 * 3 * 1.1cm / 2.3 * 1.2 * 0.4inPackage size: 15 * 10.5 * 10cm / 5.9 * 4.1 * 4inPackage weight: 516g / 18.2ozPackage List:1 * Host2 * Loudspeakers1 * Remote Control(within button battery)1 * Bag of Accessory