MP3 player + FM radio + Security alarm system + Wireless remote. 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 motorcycle Loudspeaker color: red, black(optional) Voltage: DC12V Power output: 2 * 10W Standby current: ≤0.01A Supporting format: MP3 Supporting device：SD/MMC card FM radio range: 88Hz-108Hz Operating frequency range: 100HZ~6KHz (315Hz,+/-0.5dB) Working temperature:0-60℃ Remote control distance: ≤100m Host size: 7.8 * 6.3 * 2.3cm / 3.1 * 2.5 * 0.9in Remote controller dimension: 5.7 * 3 * 1.1cm / 2.3 * 1.2 * 0.4in Package size: 15 * 10.5 * 10cm / 5.9 * 4.1 * 4in Package weight: 516g / 18.2oz Package List: 1 * Host 2 * Loudspeakers 1 * Remote Control(within button battery) 1 * Bag of Accessory