HUAYUN Auto Audio Main Functions VCD/MP3/CD Player (CD/VCD/MP3 Compatible). 10 or 45 seconds electronic antiknock system for choice. Sony pure digital servo. Super anti-jamming electronic tune radio reception system(AM/FM radio) 30 broadcasting stations storage automatically(FM18,AM12 broadcasting stations). Full electronic volume control. Timepiece show. Big power output(4*45W) Big LCD screen. Detachable and theft-resisting panel. Full function infrared remote control. Manifold DSP sound field effects for choice Long/near distance lock. Main Capability guideline Radio: FM AM Frequency range: 87.0-108MHZ 522-1710KHZ Usable sensitivity 5dBu 20dBuV SNR: 55dB 50 dB Stereo SNT 35dB Distortion; 0.5% 1% CD Play: SNR: 80dB Abruption 70dB Frequency response: ±3dB 20Hz-20KHz Distortion: 0.3% Biggest Power output: 4*45W Speaker impedance: 4*(2-8) Installation Size: 178mm*155mm*50mm Others: ESP protection: 10/45 seconds Color model: PAL/NTSC Power: 10-18V DC Auto battery, cathode grounding.