650W PTC Boat Cabin Heater with Built-in Thermostat & Waterproof Fan - Safe Marine Engine Compartment Heater for Winter Freeze Protection - Ideal for Boats, Yachts & RV Living Spaces to Prevent Pump Freezing & Keep Cabin Warm

【Extend Your Boating Season】You won't have to worry about freezing damage with the THERELMAX boat engine heater. The boat engine compartment heater keeps the bilges warm and dry, whether you patrol the waters or just like taking your boat out on colder days, you'll always be good to go with an engine compartment heater on board. THERELMAX marine engine block heater will also help you to significantly reduce your winterizing costs.

【Built-in Adjustable Thermostat】Equipped with an adjustable thermostat that return control to the user, allowing for more applications. Perfect for a boat bilges, RV bays, wellhouses, greenhouses, workshops, lithium warmers, service van, recreational vehicles, and more! (Temperature range 41℉-86℉. For boat engine compartment heating applications, it is recommended to set the temperature to 46℉.)

【3s Fast Heating】This Marine Heater with 650W safe PTC ceramic heating technology rapidly heats the bilge compartment. This prevents critical engine and compartment components from ever getting close to freezing temperatures.

【Built for Ultimate Reliability】This boat heater features a rust-resistant aluminum alloy case, a sealed electronics module, and a waterproof fan to provide consistent temperatures throughout the engine compartment. We live and breather harsh marine environments, so we designed each component with reliability in mind.

【Trusted Quality】The housing and core components are made of powder-coated epoxy aluminum alloy and aluminum to prevent rust, extend the life of the heater. We are confident in the quality and construction of each products and ensure that all of our products are produced and certified to regional, national, and international industry standards. THERELMAX offer a 1-year warranty to cover manufacturing defects.