Feature: 1. Self Heating: When the water temperature reaches the preset temperature, the pool heater will automatically stop. And when the temperature is lower than the preset temperature, the heater will automatically turn on again. 2. Dry Burning Prevention: The swimming pool heater is equipped with a pressure switch to protect it from the risk of dry burning due to lack of water in the operating process. 3. High Temperature Guard: The hot tub heater has a high temperature guard switch. When the temperature reaches 50C due to a lack of water flow or a blockage in the inlet, the heater will cut off power. 4. Wiring Method: Pool heater typically do not come with a standard plug attached because it often requires higher voltage and current levels compared to standard household appliances. Instead, they are designed to be hardwired or connected using specialized connectors. 5. Accurate Temperature Control: With circulation system, the water temperature can be evenly distributed and the heating efficiency can be improved. Easy to operate, easy to adjust the water temperature, good user experience. It can accurately control the water temperature, to ensure that the water temperature is stable. Specification: Item Type: Pool Heater Thermostat Material: Stainless Steel, Plastic Weight: Approx. 1655.00g / 58.38oz Water Pipe Connector Size: 1.5 Inches. Package List: 1 x Pool Heater Thermostat4 x Connector2 x Gasket1 x English Manual