hygger Mini Aquarium Heater, Small Submersible Aquarium Heater 100W Mini Betta Tank Heater with Thermostat &Explosion-Proof for Saltwater Freshwater 3.8-76L

•Safe and Durable Construction - Built with shatterproof quartz tubes wrapped with two heating elements mica plates and nickel wire, and a high-impact plastic outer shell, the hygger Submersible Aquarium Heater keeps pets safe while maintaining the proper temperature

•Temperature display - the heating rod displays the water temperature and indicator light in real time. It is red when heated and green when it reaches the appropriate temperature.

•External Knob Controller Memory Function - Allows you to quickly set the temperature without getting your hands wet, especially in winter, with adjustable wide temperature range of 15°C to 34°C in 1°C increments. Remembers the last setting when you unplugged and changed the water.

•Outlet water shut-off protection – ensuring it does not overheat and cause damage to livestock. Shut down before the temperature exceeds the desired temperature. Shatterproof plastic guard protects fish/turtles from impact and contact, easy to remove and clean

•Ideal for small, shallow tanks - the ultra-thin flat mini tank heater measures 4.3'' x 1.8'' x 0.9'', saving quiet space and easy to hide behind filters/wood/rocks, mounted with Two powerful suckers. Due to its flat design, it can be placed vertically or horizontally on a gravel-free aquarium bottom to heat a turtle tank with low water levels.