Power Voltage: 12-16V; SNR: 65dB; Impedance: 4-8; Sensitivity: 22dB; Screen Size: 3.0 inch; FM Frequency Range: 87.5-108.0MHZ; Power Source: Cigarette lighter; Overload Protection: Yes; Overvoltage protection: Yes; Overheat protection: Yes; Product Features: 1. Fixed front panels, 3.0 inch LCD screen LED display /digital clock; 2. USB/SD/AUX port, high quality digital FM Tuner; 3. Four-channel high power speaker 7W X 4, ultra-long 45 seconds ESP shockproof electronic system; 4. Adopted infrared remote control, enhanced mega bass output signal; 5. SD/USB/MMC player, high fidelity audio formats; 6. Support extended SD card up to 32GB; 7. FM frequency range 87.5-108MHZ; 8. Adopted car rules requirements digital display technology, dynamic spectrum, is extremely vivid; 9. Many options EQ sound scene: Jazz, rock, pop, classical, six kinds of DSP digital sound control; Bass & Treble, left and right channels adjustable. 10. Adopted four channels, left and right, front and back separation, with multiple circuit protection tests. (Overload Protection, overvoltage protection and overheat protection).