The Viqua UV Max 650716-007 UV system power supply is a replacement power supply kit (also called a controller) that is used to replace the power supply of a 1994-2008 Trojan UV Max system. The 650716-007 is a member of the company's line of replacement power supply kits/controllers and is used specifically for the UV Max D system. The 650716-007 controller operates at 100-240V and weighs 0.9 kilograms. The UV Max 650716-007 plugs into a wall outlet and acts as a transformer - taking the native voltage and amperage and converting it to the proper voltage and amperage for the UV lamp. It also provides valuable information to the UV system operator in the way of a digital readout, making it easy for you to determine UV purification levels and the need to replace the controller again.