NICREW Mini Submersible Aquarium Heater, Digital Temperature Display Fish Tank Heater with Adjustable External Controller, Suitable for Freshwater & Saltwater Tank up to 10 Gallon, 50W
Brand: NICREW

Its slim profile and unobtrusive design allow the tiny heater to fit perfectly inside micro tanks and mini aquariums. This heater provides the natural warmth that fish like bettas and guppies need by heating a 3-10 gallon tank or bowl to the ideal temperature.
Overheat Protection
Intelligent temperature control circuit promises an automatic safety shut-off and overheat protection.
Remote Temperature Regulate
Easy to change the temperature without touching water.
On/Off Indicator Light
Red: Aquarium temperature is below set range, heating function will engage and increase temperature automatically.
Blue: Aquarium temperature is within desired set range, monitoring function is engaged.
Specification:
Product Dimensions: 4.6 in×2 in×1.2 in
Temperature range: 68℉ -94℉
Cord Length: 3.1 ft
Power: 50W

Equipped with precise temperature probe, making the temperature difference within ±2ºF to provide ideal living environment for your aquariums
Safe and easy to use external controller help operate without getting hands wet, allow Celsius and Fahrenheit control from 68℉/20°C to 94℉/34°C
Automatically shut off will be activated if heater is no longer properly submerged, preventing damage
Ideal for freshwater and saltwater aquariums, aquaculture, glass containers, and hydroponic systems
50 watts heater is designed for 3-10 gallon fish tank