Heating Rod for Aquarium Mini Small Aquarium Heater Digital Display USB heating rod, temperature can be adjusted 18-34 degrees, automatic shutdown when temperature exceeds C. Small size, save space in the aquarium and is more beautiful. Digital display LED, adjustment accuracy is 0. C or F, and the display accuracy is 0. , simple operation. Made of nichrome wire, durable and safe. Suitable for fighting aquariums, mini aquariums, turtle aquariums, horned frogs, drinking water for pets, etc. Make sure the power supply voltage is correct, otherwise the product will not heat up. (Must be fast charging, 5V/2A) Specification: Material: Nichrome Wire Description of the function: 1. On State On --- When the power is turned on for the first time, the heating rod temperature control display shows 88,8, then the temperature control display shows the temperature, and after 3 seconds, the heating rod shows the currently detected water temperature. 2. Temperature control switch --- press the switch briefly,to adjust the temperature, the number on the temperature control display flashes and enter the temperature setting mode,temperature control display shows the temperature value,During this time, press briefly once to increase by 0,5 degrees,accumulative set temperature, temperature range is 18--34 degree cycle setting,The current set temperature value is automatically saved after 3 seconds of not pressing the key. Size Chart: Size: 5.5x2 cm/2.17x0.79 inch The package includes: 1 piece heating rod for aquarium