An automatic; submersible heater for use only in indoor aquariums and terrariums. Probably the smallest aquarium heater in the world; the NeWattino is designed for aquariums between 2 to 20 litres. The casing is manufactured from an extra tough polymer; making it extremely resistant to knocks and sudden temperature changes. It also has a built-in sensor that automatically switches the heater off when out of water and on again when re-submerged. The heater is permanently on and there is no requirement for any temperature adjustment - pre set at 25\'C Newattino Plus: Includes a self resetting thermal cut-off Includes electronic thermostat pre set at 25C A red light is visible when heater is working