ST-997 Mini Car HIFI Audio Amplifier Board Digital Stereo Amp 4 Channels Blue 80W 12V USB SD FM Universal

Features:- Current Overload, Short Circuits, Thermal Overload, DC Offset.- Mono 1000 Watts Car Audio Amplifier gives you a wonderful in-car entertainment.- High power, good sound quality, no distortion, give you a great hearing enjoyment.- Light weight, handy and easy to install.- Powerful bass.Specifications:Amplifier type: HIFI amplifierModel: ST-997Voltage: 12VPower: 80WPower input: DC 12V/5AOutput power: 40W+40WFrequency: 20Hz-20KHzInput Impedance: 0.25mV-220mVSpeaker ipedance: 4-16ohmSNR(Signal/Noise Ratio):-95dbnSize: 17CM*10CM*4.2CMColor: BlueMaterial: Aluminum alloy + plasticWeight: 0.5KGThree places to install the amplifier should pay attention to:1: Connect the power supply (+12V) must be connected to the battery positive pole, can not find a positive linein the car, or burn the car circuit, then the cup!2: The GND interface must be connected to the negative pole.3: The middle of the three interfaces connected to the power line is the control line REM. Start the test machineand take the +12V test directly! Then find the ACC control line interface on the CD. When wiring, be careful not totouch the place where the iron is placed on the car. Carefully wrap the exposed area with electrical tape, otherwise itwill cause a short circuit. Burned out the machine.Note:1.We provide clear pictures, measurements where possible. Please check as much as possible to make sure theitem is the one that you need.2.Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54