Aqua One Glass Aquarium Heaters •High quality and economical heaters. •Fully submersible with double insulation. •Heater thermostat with easy to use temperature settings. •Easy to read temperature guide. •Automatic shut off and on light. •Suitable for marine and tropical aquariums. •1 Year Guarantee. Spec: 100w Glass heater. Aquariums upto 100litres. Length: 20cm. Wattage: 100w . Operating Voltage: 240v/50Hz. Cable length: 1.8m.