Mini size easy to install by DIY, especially good fit for Car, Bike, Boat and Marine; Remote control up to 5M distance between player; all function advisable (except power ON/Off); The number buttons on remote control panel can be direct search to the music track, it also play the music track randomly or one/all repeat; Specification: FM RADIO Out-Put Power :2 * 20Watts (Peak Music Power); Input Power: 12V-18V, 3-5A DC (5.5mm outlet/ 2.1mm centre hole jack); Input Sensitivity:200mV; Input Impedance:47Kohm; Frequency response:20Hz-20KHz; Speaker Impedance:4-16 ohm; Minimum THD <0.05% Signal/Noise Ratio >100dB(line in) 60dB(MP3); Supports MP3 format; Supports USB flash/jump drive and SD/MS card (max 16GB SD card); Interfaces: SD/MMC/MS + USB + L /R + 3.5 mm; Tone Control with BASS and Treble / Volume Control Aluminum alloy case good for sinking heat ! Full featured IR remote controller included (CR2032 batteries, included)