Protect your engine against freeze damage and continue boating into the cooler months with safe, ignition-protected engine compartment heaters. Ideal for heating bilge/engine compartments, Pali BilgeSafe Heaters utilize energy-efficient, self-regulating PTC heating elements that cannot overheat and meet all requirements for ignition protection. In addition to protecting engines, these heaters also benefit batteries by combatting cold temperatures that can shorten battery life. Red LED indicates when the heater is running and heating the engine compartment. Each heater includes a quick-release mounting plate for easy installation and removal. Economical model 300 begins heating as soon as it is plugged in, while the 300T utilizes an internal, hermetically-sealed thermostat that turns the heater on at 45°F (7°C) and off at 65°F (18°C).