Versatile Compatibility: The voltage (surge) protector is compatible with different appliances, for instance, air conditioner, TV, laptop, microwave, iron, washing machine and refrigerator, etc. Adjustable Knob and Switch: The minimum voltage capacity of the protector is adjustable. It can be adjust from 90V to 105V according to your needs. Delay Function: If the device encounters (electric power) voltage fluctuations, it will protect the appliance by providing the output until the voltage stabilizes. The “ON DELAY” indicator would be turned on to inform its user. The appliance would be delayed for 2-4mins to confirm that the voltage is stable so that it could be re-established. Simple and Easy-to-Understand Indicators: When the voltage rating of the appliance reaches the maximum/minimum allowable capacity of the protector, it automatically cuts off the load/power. In the meantime, the “OVER VOLTAGE”/ “UNDER VOLTAGE” indicator will light up to alert the user to the voltage and usage of the appliance. Automatic Induction Protection: Protect your electrical devices from voltage spikes, instant surge, voltage fluctuation, brownout and those voltage which are too high or too low.