The VIQUA 650716-006 Controller Power Supply Replacement Kit for the discontinued Trojan UVMAX model B and C systems manufactured between 1994-2000. The 650716-006 power supply is a transformer that supplies the correct voltage to the B and C system and updates the obsolete blue controller with a newer, smaller system. It also keeps you informed by having both audible and visual alarms, a lamp replacement reminder, and indicator lights to show system status.