DC12V 20A 250W Waterproof IP67 LED Driver Power Supply Transformer UK~3353 Feature of Waterproof DC12V IP67 20A 250W LED Driver Power Supply Transformer: 1.With the functions of over voltage protection, short circuit protection and overload protection 2.Constant voltage output, to ensure the stability of the power supply 3.With the anti-interference function, to ensure the long-life LED lamps 4.Waterproof IP67, for outdoor use. DC12V IP67 Constant Voltage LED power supply / driver / transformer The LED Transformer / Driver is used to power low voltage (12v) LED bulbs strip lighting or any other DC 12V devices. This is a Smart switch power supply for converting AC 170V/250V to DC 12V with a switch to choose proper input voltage of AC 170V or AC 250V and provides a steady output voltage.