Usage Tips:High efficiency, wide frequency, quality.Strong heat dissipation drawing technology is compact.12V 600W car amplifier board gives you a wonderful in-car entertainment.With current protection, overload protection, short circuit protection.Connecting to the 12V supply must be connected to the positive electrode of a battery, can not in the car just to find a positive line connected, or burned out car circuit.GND interface must be connected with the cathode.Connecting the cord of the three interface in the middle of the interface is the controlline rem, began testing machine take 12V test. And then find the top of the controlline interface wiring, and be careful not-to-Press the ground in the car, the exposed place carefully with electrical tape wrapped package is solid, otherwise it will a short circuit burned out the machine.Voltage: DC 12VMax : 600WRated : 150WCurrent: 10AImpedance: 4ohm: Less than 0.1%Frequency Response: 30Hz~280KHzColour:blackMaterial:Metal + plasticSize:17 x 15.5cmPackage Contents:1 * Car Amplifier BoardOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.