Elive Easy-Set 50W Submersible Aquarium Fish Tank Heater with Visible Temperature and Thermometer, for up to 16 Gallons, with Suction Cups Sturdy Design: The fully submersible heater is made of shatter resistant and durable quartz glas. For Any Tank Type: Our heater works and stays sealed in both salt or fresh water. Easy Setup: Just plug it in and youre ready to go. The LED operating light confirms that the heater is working correctly. Temperature Adjustable: The heater easily be set to temperatures between 68F and 93F (20C - 34C). Trusted Name: Elive has been a high quality manufacturer of aquarium equipment for many years and is proud to be the most trusted brand for aquatics in the US today. Shatter Resistant Durable Quartz Glass LED Operating Light, Red = Heating Fully Submersible Limited Lifetime Warranty 6 foot Power Cord 8 foot Power Cord for 150W and Above Heaters Large temperature dial makes setting and adjusting the heater easy Suction cups and brackets to easily mount the heater anywhere in the aquarium Durable shatter resistant design, with protective rubber ends Thermal switch safely shuts off heater if used improperly Thermostat calibrated for accuracy +/- 1 degree F Shatter resistant quartz tube construction Protective rubber ends Thermal safety switch Fully submersible Can be positioned anywhere in the aquarium Mounts vertically or horizontally For freshwater and saltwater use