fridge guard white in colour has high quality power protection from instable electricity which may cause damage of same electronics machine such as Refrigerators.The fridge guard protects refrigeration appliances by disconnecting power when it goes belowUnacceptable level.N.B There is a delay when power returns to normal and this will consume that the appliance is safe.The fridge Guard has 3 lights (Red, orange and green ) Red light when it’s off,orange when it’s on standby and Green when it’s on its delay to power on to ensure safety of the refrigerator connected.