Sensors with a special precision machining package with moisture barrier, stable and reliable performance. Specifications: Operating voltage: AC220V 50HZ / 60HZ Output load: 44A / 220V AC Power: 9KW Control range: 65 (MAX) Resolution: 1 Accuracy: ± 1 Input signal: one road measure temperature sensor, 20K X 1.5m Machine size: 44.6 x 34.1 x 10.4 cm/L x W x H Outer hole size: 38mm/1.5inch Inner hole size: 38mm/1.5inch Note: Please allow ±1cm error due to manual measurement. Before using the installation requirements: 1.The power supply voltage and the voltage marked on the machine to be consistent, deviation of supply voltage and the rated voltage is not more than ± 10%. The sensor should maintain an appropriate distance from the power line, avoid contact or close. The strict distinction between sensors, power lines and the output relay interface. Package Included: 1 x 9KW 220V Swimming Pool Electric Water Heater. International buyers please note: a. The item "9KW 220V Digital Swimming Pool & SPA Hot Tub Electric Water Heater Thermostat" is in sale since Monday, February 27, 2017. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Pools & Spas\Pool Equipment & Parts\Pool Heaters & Solar Panels". The seller is "mhestore2009" and is located in HK. This item can be shipped worldwide.