The Philips & Temro Battery Heater with 30" Cord-Thinsulate™ Thermal Blanket is the perfect solution for maintaining available cold cranking amps in cold weather. This battery heater features efficient direct heat transfer, allowing it to be installed in sub zero temperatures. The improved recharge time and AC operation at 120Vs make this battery heater a great choice for cold weather climates. The thermostat is set to turn on at 60 °F and off at 80 °F, ensuring your battery is kept at the optimal temperature. FleetPride is your First Click in Heavy Duty®.