This Voltage Guard has a fast response time, there is no way surge and spike could get into your appliance. When lightning occurs around your home, it is enough to damage your flat screen TV and other appliances. When you have this guard installed in your home, there is absolutely nothing to worry about. It should be noted that lightning alone does not cause power surges, when there is frequent power interruption that causes indiscriminate switching on and off; this may have negative effect on electronics as well. This guard will draw up all surges making sure it does not get to your appliances. This guard will eliminate all the risk associated with irregular power supply.