Features Precise Temperature Control An intelligent IC chip controls the heater s temperature keeping the temperature difference within ±1℃ ±2ºF It provides the best living environment for your aquatic creatures This submersible heater is more resistant to damage while heating better than traditional glass heaters Built with overheat and water shortage protection External Temperature Controller The touch button controller adjusts the temperature without getting your hands wet It s easy to control the temp from 68℉ 20°C to 94℉ 34°C C °F Conversion switching display Specifications Brand ZhiYangName Aquarium HeaterSize 29 x 5 5 x 4 cmPower 300W 500W 800W 1000W 1200WVoltage 110VPlug USType 2 Type 2 with segment timing function Package Contents 1 x Aquarium Heater