fishkeeper 300W/500W/800W Adjustable Submersible Aquarium Heater - PID Electronic Smart Thermostat Fish Tank Heater with Out-of-Water/Run-Dry/Overheat/Low-Temp Protection for 40-220 Gal Fish Tanks

✦✦ Accurate Temperature & Ultra-Safe Protection✦ This internal aquarium heater is a fully-electronic high-quality heater. Advanced water sensors and IC chips combined with PID precision electronic algorithm technology make the temperature accurately controlled within ±1℉; Buil-in multiple safety functions: run-dry, overheat and low temperature protection, which can intelligently monitor temperature at any time and give maximum protection, no more worrying about it will “cook” your love fish!

✦✦ Smart Frequency, Rapid & Efficient Heating✦ Adopts high-quality nickel-chromium heating wire to bring an extremely fast heating experience. Its intelligent system auto-adjusts power: Full blast when heating cold water, then seamlessly reduces as it nears your target temperature and constant temperature. This means quicker comfort for your fish and lower energy bills for you – win-win!

✦✦ Enhanced Explosion-Proof Quartz Glass✦ The submersible fish tank heater is made of thickened explosion-proof quartz glass, high-density silicon carbide sand filler in the tube makes the fish tank water heater evenly and effectively prevents electric leakage. The smooth and pretty heat-diffusing shell also protects curious critters from burns and complements your tank's aesthetics.

✦✦ Crystal-Clear LCD Display & Effortless Control✦ The bright LCD backlight temperature display with indicator lights can clearly observe the working status and water temperature in real-time. External touch thermostat, cyclic 59℉~94℉ / 15℃~34℃ adjustable temperature; ℉/℃ temperature units can be switched, simple to use and avoid wet hands. Comes with 4 powerful suction cups for exchange, can easily and firmly be placed anywhere in the aquarium, either vertically or horizontally.

✦✦ The Right Fit & Worry-Free Ownership✦ Choose the perfect wattage: 300W (for 40-80 Gal), 500W (for 80-150 Gal), 800W (for 150-220 Gal). Features 9.9FT lengthened UL-certified power cord (5.9ft + 4ft), Voltage 110-120V/60Hz. Suitable for freshwater and saltwater tanks. Before being dispatched to customers, each aquarium water heater undergoes our rigorous computerized testing ensure the highest possible precision of operation and top performance.