Mxmoonant Pool Heater 3KW 220 240V, Electric Hot Tub Heater Water Thermostat with Temperature Control Self Heating for 500 Gals Spa, Bathtub, Swimming Pool (Hardwired)

[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...