hygger Small Aquarium Heater, 50W Submersible Betta Fish Tank Heater with Adjustable Temperature External Controller, Turtle Heater with LED Display for up to 10 Gallon TanksBrand: hygger Color: Black Features: Great For Small, Shallow TankSlim flat profile mini tank heater measures 4. 6''x 2. 7''x 0. 9'', which is space saving and with two strong suction cups mount. It can be placed vertically or horizontally at gravel free aquarium bottom to heat up low water level turtle tank Built in Temperature Sensor, with 1AccuracyUpgraded chip, the temperature sensing is more sensitive, the temperature rise is more accurate, and