Features: 1.With back protective cover, prevents the turtle from scalding after it has been arched. 2.Built-in U-shaped quartz heating tube for faster and safer heating. Stepped heating technology, reaches the set temperature, stops heating, below the set temperature, and automatically starts working. Temperature difference is controlled at 1 degree. 3.Real-time display of tank temperature, precise temperature adjustment button, safe external temperature control. 4.Intelligent LED large digital display, when heating, it will automatically adjust the heating speed according to the change of temperature value, and the temperature will reach the set value and automatically intermittently warm. 5.Suitable for fish tank, aquarium, turtle tank. Specification: Item type: Heating Rod Material: plastic Color: black Weight: Approx. 225g Size(length x width): Approx. 10x6.8cm/3.9x2.7in Temperature control range: 17-34 Degree C Accuracy: ±1 DegreeC Voltage: 220V Plug: CN Options: 25W, 50W, 75W, 100W Suitable for fish tank: 25W: about 12L water below the fish tank 50W: about 25L water below the fish tank 75W: about 35L water below the fish tank 100W: about 50L water below the fish tank PackageList: 1 x Heating rod Note： The heating rod must be fully dived! Do not expose out of water surface.