Description: 【Quick Pairing】The USB fish tank aquarium heater is of simple click connection, easy to pass through the wall, responsive, partition wall of 360° all round mobile phone remote control with control distance between 5-20 meters in different environments. 【Easy Operation】The mini aquarium heater is easy to connect to phone. The adjustment accuracy is 0.5C or 1F, the display accuracy is 0.1 of degree, and the setting temperature is 18-34 (64-93) arbitrarily set. 【Digital Display】The adjustable mini fish tank heater auto thermostat is easy to read temperature. APP to check the working in real time is more convenient that you know at a glance without running to the fish tank. 【Voice Alarm】The mini submersible aquarium heater is with voice alarm for real time of reminder that will immediately give voice prompts when the power is cut off, the temperature is overheated. And over temperature 36 of degrees, automatic power off. 【Wide Applications】The submersible aquarium heater is widely suitable for fighting fish tanks, aquariums, turtle tanks, horned frogs tanks, pet drinking water fountain, etc. Specification: Material: Nichrome Wire Size Chart: Heater: 5.5cmx2cm/2.17inchx0.79inch Cable length: 120cm/47.24inch Package Includes: 1 Aquarium Heater Note: Please allow slightly errors due to manual measurement and different monitors.