1.MAX Power Rating : 4 ohms: 1200 x 2 2 ohms: 1900 x 2 Colour: Black material: metal 2. Power Rating: 4 ohms: 800 x 2 2 ohms: 1300 x 2 3.LED power indicator 4.Low pass filter 5.Metal case 6.Input:12V Note: 1. connect the battery positive,'t just connect a positive line casually, or it will Burn out circuit. 2.The GND interface must be connected to the negative pole,ground connection is OK. 3.Be to connect the REM interface.when you test the amplifier,you can connect with power ground +12V.And then,you should find the control wire interface which on your CD player, if the Player has no this interface,you can connect the line that on the key switch.Make 't Press the iron, or it will short-circuit. 4.If you find the indicator light is red when you wiring, unplug the power immediately and .If the red light lasts for minutes,the protection of the amplifier will burn out.The blue light is normal. Package included: 1 Amplifier Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.