Feature:1.Mainly material of the shell is plastic.2.Easy to use, the knob will help you adjust the light brightness or turn on/off the light easier.3.Easy to install, standard 5.5x2.1mm DC plug, no need for wiring or soldering.4.Widely used for single color LED rope light, LED ribbon, LED strip light such as Surface Mounted Devices 3014/3528/5050/5630/5730, LED tape lights, aquarium lighting, etc. Suitable to place in your kitchen, dining room, living room, or bedroom.Specification:Shell Material: PlasticMax Current: 2AWorking Voltage: DC 12 to 24VPower: 12V<=24W, 24V<=48WDC Plug Size: 5.5x2.1mm(0.22"x0.08")Overall Length: 390mm(15.35")LED Dimmer Size: 66x33x34mm(2.6"x1.3"x1.34")Package Content:1 x LED Dimmer