HITOP Mini size aquarium heater 25W with controller suitable for seawater and freshwater heating betta fish and turtle tanks and other small fish tanks or fish bowl 1-6 gallon Easy to operate: This fish tank heater is easy to use 6Ft long cable wire and the external controller can easily set the temperature and the temperature adjustment range is 68-93 Easy to read temperature: The controller of this heater has Digital LED temperature display which can display the real-time water temp and set temp so that you can know the temperature changes in the fish tank easily There is also a clear heating indicator on it ish-friendly: This aquarium heater is made of thickened quartz glass and has good sealing performance to prevent water from entering making it a more fish-friendly heater Package: comes with two suction cups a bottom cover and a sticker-thermometer Please check the product carefully before using it we provide a 12-month warranty for this product