The M-Series submersible heater range provides exceptional performance, unsurpassed reliability and exclusive mirror technology to blend in with its surroundings. 50-Watt heater designed for aquariums up to 15 US Gal / 57 L Made in Europe using superior components and construction Durable, mirrored finish seamlessly blends heater into surroundings by reflecting colors of the aquarium Computer-calibrated thermostat Easy-to-adjust temperature control dial Sleek and compact design For use in freshwater and saltwater aquariums This item is in excellent used condition and comes in original packaging.