Foodie Puppies Sobo Heating Rod FX-100W, Aquarium Fish Tank Heater with LED Temperature Display Submersible Aquarium Immersion Heater

Convenient Temperature Display & Adjustment -- Real-time temperature display, DaToo heater can accurately display real-time water temperature, no need to buy an extra thermometer, save you money. External temperature controller, just press it gently outside the fish tank, and you can get the temperature you want, it will not scare your cute fish. Very convenient! This heater is 100% submersible use only, during its heating time, it must be 100% submerged in the water.