Ideal for Hobbyists for Controlling model railway LED & Filament Bulb lighting. It also has a great number of other general hobby lighting uses. Uses PWM software to correctly dim LED’s The dimmer has 8 independent dimable outputs, these are extremely easy to set by adjusting each knob. On boad LED indicators display brightness settings. Each of the 8 outputs can power 500ma 2.1mm socket for power input. As fitted to most power supplies. Requires a 12 volt DC power input. Dimensions 118mm x 45mm Supplied with full instructions.