The Viqua 650709-009 is replacement power supply kit (also called a controller) that is used to replace the power supply of a Viqua system. The is the newest version of the company's line of PRO controllers and is used for the PRO30 RS system. The Viqua 650709-009 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. Operates at 100-240V and weighs at 3.6 kilograms This replacement power supply kit is for 120V and 230V Simple plug-and-play, color coded connections Helpful lamp replacement reminder Lamp timer reset button Indicator lights show status of system components Mute button for warning alarm sounds Compatible with PRO30 RS (2008 on) Professional UV systems