... desired temperature hermetic double layer design, submersible in any angle. Heater AL-2201Power: 50W, 75W, 100W, 150W, 200W, 300WVolt: 110/220 ... .Thermometer-style temperature indicator is easily visible sensitive and reliable thermostat maintains uniform temperature.2.Heating element is highly effcient and ... , designed for extended use and completely safe. Mini Aquarium Glass Heater AL-2201 Series