Specification: Material: nickel chrome wire Voltage: 5V Power: 10W Size: heating rod body 5x2cm/1.97x0.79inch Feature: 1.USB heating rod, the temperature is adjustable from 18 to 34 degrees, and it will automatically power off when it exceeds 36 degrees or when it is out of water. 2. Mini size, save aquarium space, more beautiful. 3. Digital LED display, the adjustment accuracy is 0.5C, the display accuracy is 0.1C, and the operation is simple. 4. Made of nickel-chromium alloy wire, durable and safe. 5. Suitable for fish tank, mini tank, turtle tank, horned frog, pet drinking water, etc. Package Included: 1 * fish tank heater Notes: 1. Due to manual measurement, please allow a slight error. 2. Due to the difference of different monitors, the picture may not reflect the actual color of the item.