hygger Mini Fish Tank Submersible Aquarium Heater 150W Betta with Digital Display Controller Adjustable Temperature for 75-115L Freshwater Tanks

Explosion-proof Quartz Heating Tube: As an advanced aquarium heater, the explosion-proof and insulated quartz tube is safer than traditional coil heaters. The explosion-proof insulated quartz tube and high temp resistant ABS shell avoid melting. Built with nickel-chromium heating wire for fast heating and long service life; dual chip safety protections fully safeguard you and aquatic pets Memory Function and Automatic Shut-off: This fish tank heater features an independent external digital controller that supports adjustable temp from 15℃ to 34℃ with real-time digital display. The memory function retains settings after power restoration. It stops heating once the set temperature is reached Intelligent Temperature Safety Control: Featuring low-water cut-off and overheat protection, this reliable heater for fish tank auto-stops heating, outputs beep alerts, and shows error codes upon faults. “Er” (plus current temperature) shows when the heater is exposed to air; “EE” triggers auto shut-off at 95 °F (35 °C) Mini Compact Hidden Design: Slim 150W heating element fits 75-115L small tanks, betta tanks and shallow turtle tanks; compact black body can be hidden in tank corners to save space, suitable for freshwater & shallow water habitats External Temperature Controller and Easy Use: Designed as one of the best fish tank heaters for tropical setups, it allows you to set the desired temperature and check the setup record in one clip. You can set up the temperature when it flashes. After the setting is completed, the numbers are stable and no longer flashing. Press the "SET" button to check your setup record in one clip