Voltage stabilizer (automatic voltage regulator) protect your equipment's from damage. Monitors all incoming Elec tricity and cleans out the damaging currents. Ensures that your equipment will receive only y safe and clean electricity. Switch on, after equipment's is connected to the voltage stabilizer, press the "on" button. Switch off, press the "off" button. Overload protection, the power switch will turn of f power when stabilizer is overloaded. (Check your maximum VA load for unit). Output short protection, when stabilizer becomes shorted the power switch will turn of f power. (Must manually turn flip power switch for power). This is a Hazmat, Non Returable item.