MT0001162 Specification: LCD display, LED security light Support MP3/WMA file playback from USB/SD Card (Maximum support 32GB) Support FM Radio, automatic frequency adjustment Support hands-free calls, answer or hand up the phone after connect the radio Volume Control/ Real Time Clock Function/ FM Radio/ Electronic Preset Equalizer Control AUX audio input Auto memory preset store Remote Control Power Supply: 24V Max Power Output: 60W4 FM Frequency Range: 87.5-108.0MHZ Panel Size: about 18.8 x 5.8cm (L*H) Installation Size: about 17.8 x 12 x 5cm (L*W*H) Back Light: blue Connecting Method: Turn on your phone function, search on and connect the "CAR/btmp3" item Enter password "0000" (if needed) Press MODE button to the function then the MP3 Player is now available for use. Testing Methods: 1) Twist the RED and YELLOW wire together and connect to the anode. The BLACK wire connect to the cathode. 2) Connect one piece of the wires to the horn, do not touch the wires each other. Installing Methods: Please DO NOT electrify the machine before you connect the wires, otherwise it will damage the machine. The YELLOW wire connect to the anode of accumulator, while the BLACK cathode. The RED wire connect to the car key ignition.