Kat's 14900 750 Watt 3" Lower Radiator Hose Heater Thermostatically controlled and does not contain a motor Easy to install with versatile applications and available in 400, 600, and 750 watt Cord permanently attached for best electrical connection Connects to normal AC power via regular power outlets Thermostat is fixed (thermostat Opens @ 175 F and Closes @ 135 F ) and cannot be adjusted