I changed my setup to a PDM so I no longer need this controller. This is a very heavy duty Autocoolguy 200A dual fan controller. You never have to worry about melting relays with this. It has soft start and will PWM control your fans. Also comes with a thermostat that slips in the lower hose so you can adjust when the fans come on. This worked great with two big SPAL HO cooling fans. Asking $225.00 shipped and PayPal'd.