The moisture meter can quickly measure the moisture content of the grain. 1. ULTRA SHORT BAR BODY: The submersible aquarium heater is made of high temperature resistant ABS material with extra short bar and external temperature control knob for more intuitive control. 2. HEATS UP FASTER: Submersible aquarium heater with explosion-proof quartz tube and high purity nitinol wire inside, thickened heat transfer, faster and more stable heating. 3. PID TEMPERATURE CONTROL ALGORITHM: Protect fish, aquatic organisms and users from burns. The PID temperature control algorithm realizes high thermal energy and low energy consumption. 4. SMART INVERTER TECHNOLOGY: Using intelligent frequency conversion technology, the power level is freely regulated by the chip, always maintaining the lowest constant power temperature. 5. EXTERNAL CONTROLLER: The adjustable aquarium heater has an external controller and is equipped with the most advanced heating system for precise control of the aquarium temperature. Please allow slight dimension error due to manual measurement. Item Type: Submersible Aquarium Heater Material: ABS Application: Automatic Aquarium Thermostat Heater Plug specifications, voltage: EU plug, 220 V Temperature control range: 16-34 Length: approx. 23 cm / 9,1 inch List of packages: 1 x Submersible Aquarium Heater 2 x Suction Cup 1 x User Manual