Main Category :Machinery Sub Category :Mechanics Uditha Dissanayake This water heater can self protected in mistakes or careless using. It's heater coil doesn't activate whether only it is plugged in and powered on ,when not dipped enough in the water. And by lighting a red LED which is on the top of the handle shows power has supplied and it's in STANDBY(S/B) mode. When it's heater coil is being dipped enough in the water heater coil is activated by lighting a green LED on the handle with a "click"noise ! When in decreasing the water level harmful to the hater coil, due to mistake,it's deactivated heater coil itself and change light up green LED to red STANDBY MODE (S/B) LED.!