Description: Product code: 44397, LED Light Power Supply 12V DC 50 Watt. Has 50 watts of power output at 12V DC operation. 85-265V AC input. 12V power supply has 4.2 amps of output. The measurements of the power supply are 6.2in long, 2.38in wide, and 1.50in thick. Great constant current for LED Lights such as our 12V DC tube lights and our flexible LED Lights or use your own LED Light source. You can run up to 5 feet of tube light part number 34563 or 35 feet of flexible strip part number 49875. CE listed. To select the voltage range or change the fuse, simply remove the screw located at the front of the power supply to the far left away from the green led. Then on the back side remove the black plug just pull should come right out. After you have removed the plug slide the grate from the front to the back the grate should now just lift off exposing the innards of the power supply. Now be very careful try to not to touch anything but the switch or fuse. Select the voltage range you will be using the power supply in 120V for us 220V for EU. Next to the switch is a fuse should you ever need to replace this fuse just pull on it in a upward motion to remove it and replace it with a new one. Now that you have selected the voltage for your power supply or replaced the fuse put the grate back on by reversing the steps. To install the wires to power input and out simply loosen the screw for the correct wire slide the wire between the two little metal plates and tighten the screw down do this <b>...</b>