Description: Salt and Fresh Water Auto Constant Temp Heater: automatic constant temperature function, save your time and attention Quick Heating: Quickly heating to make sure your fishes are in the aquarium warmly and safely with this small aquarium heater, this submersible aquarium heater is a necessity in winter Accurate Temp Control: This submersible heater can control temperature accurately, which contribute to the safety and energy saving attribute of the fish tank heater Waterproof: The fish tank heating rod is compact to use and store, plug and play operation Automatically Power Off: With temperature sensing probe, over temperature induction, it will power off when it is away from water. Specification: Item Type: Fish Tank Heating Rod Material: Plastic + PT Heating Film Size(LxWxH): 9.5x3.9x1.2cm/3.74x1.54x0.47inch Length of power cord: 1.2m/3.9Ft Voltage: US Plug AC 100V-110V 28 ° C Automatic Constant Temperature Recommendations for applicable water: 10W for 3-5 liters of water 20W for 5-10 liters of water 30W for 10-20 liters of water Package Includes: 1 Piece Heating Rod Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!