Mini Digital Stereo Amplifier, Hifi Amplifier with Subwoofer, 2 Channel Class D Audio Power Amplifier 50W+50W+100W, DC12V - 24V, 2.1 Volume Controlled Stereo Amp for Home or Car

Description: This product does not contain external power supply, you can use the notebook power. Power Supply: DC12-25V Outer diameter of power connector: 5.5MM Inner core of power connector: 2.1MM Power: 2X50W + 100W Subwoofer Potentiometer Function: the left 1 is the stereo volume adjustment, the middle is the subwoofer volume adjustment, the right is the total volume adjustment Precautions for use: 1. Through the 5.5MM diameter power adapter docking power adapter and digital amplifier board, and then turn on the power adapter 220V power supply, so you can put an end to power shock and power spark. The wrong way is to first turn on 220V, then go to the power adapter and digital power amplifier board 2. Machine is a low-power mute switch, the real cut off the power supply is the power adapter outside the machine. So the switch is controlled by the mute, rather than the total power control, LED lights are not controlled by the switch, only the power supply has been accessed. 3. 19V power supply is much more than 12V power supply. Note: 1. This HIFI do not have a direct power supply for power and can be connected with the notebook for power, but with plug for 5.5*2.1mm. 2. Must be first well-connected the power port and the HIFI power port and then power on the power supply of the computer or notebook. Package Included: 1x HIFI Digital Amplifier (without power supply)