1.MAX Rating : 4 ohms: 1200 x 2 2 ohms: 1900 x 2 Colour: Black material: metal 2. Rating: 4 ohms: 800 x 2 2 ohms: 1300 x 2 3.LED indicator 4.Low pass filter 5.Metal case 6.Input:12V Note: 1.Please the battery positive,'t just 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 the REM interface.when you test the amplifier,you can with 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 the line 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,please unplug the immediately and reconnect.If the red light lasts for minutes,the protection of the amplifier will burn out.The blue light is normal. Package included: 1 x Amplifier Only 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.