Package Dimensions:18.4 x 10 x 5.2 cm; 250 Grams Size:100W Quantity:1 batteries required:No Item Weight:250 g Features:1.Step-by-step Heating Design: Every 5-10 minutes of heating, pause for 2 minutes, and circulate until the set temperature is reached.2.External temperature control, the temperature outside the cylinder is adjustable from 20C-34C/68F-93F. It can be applied at low water level, the water level can be as low as 2.5cm, suitable for small fish tanks and turtle tanks.Specifications:Voltage: 110V-240V AC 50/60HzPlug Specifications:UK PlugPower: 25W/50W/100W/200WSize: 12.5cmx7.0cmx2.5cm/4.9x2.8x0.98 inchTemperature control range: 20-34/68-93Temperature control accuracy: 1Power cord length: about 1.5mApplicable fish tank:25W, suitable for water level 1-20L;50W, suitable for water level 20-50L;100W, suitable for water level 50-70L;200W, suitable for water level 70-120L;Package List:1 X Fish Tank Heater Notes:1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.2. Please allow 1-2cm slight dimension difference due to different manual measurement. Intelligent Heater: Intelligent LED Digital Display, Water and Power Off to Prevent Dry Burning, Over-temperature Protection, Power-off Memory Function. Step-by-step Heating Design: Every 5-10 Minutes of Heating, Pause For 2 Minutes, and Circulate Until the Set Temperature Is Reached. Exquisite Workmanship: Double Heating Nickel-chromium Heating Wire, Fast Heat Accumulation. Fast Heating Speed, Better Thermal Conductivity, Energy Saving and Electricity Saving. External Temperature Control, the Temperature outside the Cylinder Is Adjustable From 20C-34C/68F-93F. It Can Be Applied At Low Water Level, the Water Level Can Be as Low as 2.5cm, Suitable For Small Fish Tanks and Turtle Tanks. SHOP WITH CONFIDENCE: To provide you with the highest quality service, If you have any question, please feel free to contact us.We will provide after-sales service until you are satisfied. See more product details Intelligent Heater: Intelligent LED Digital Display, Water and Power Off to Prevent Dry Burning, Over-temperature Protection, Power-off Memory Function. Step-by-step Heating Design: Every 5-10 Minutes of Heating, Pause For 2 Minutes, and Circulate Until the Set Temperature Is Reached. Exquisite Workmanship: Double Heating Nickel-chromium Heating Wire, Fast Heat Accumulation. Fast Heating Speed, Better Thermal Conductivity, Energy Saving and Electricity Saving. External Temperature Control, the Temperature outside the Cylinder Is Adjustable From 20C-34C/68F-93F. It Can Be Applied At Low Water Level, the Water Level Can Be as Low as 2.5cm, Suitable For Small Fish Tanks and Turtle Tanks. SHOP WITH CONFIDENCE: To provide you with the highest quality service, If you have any question, please feel free to contact us.We will provide after-sales service until you are satisfied.