An IC provides sharp active filters for each channel. It includes 3 independent controls and will power up to 900watts of lights total. Voltage: 18 VAC C.T. @ 100mA. Recommended transformer: 640-1803. WARNING: Please note that handling, testing and operating AC powered equipment can be very dangerous when basic safety rules are not followed. If you are inexperienced or not confident in working with AC powered circuits, we strongly recommend that you DO NOT attempt this kit. Recommended transformer: 640-1803. As kit contains solder it may not be available for purchase in California.