Line-r features & benefits:protectionautomatic voltage regulation avr :automatically steps up low voltage and steps down high voltage to levels that are suitable for your equipment.Lightning and surge protection:to prevent damage to your equipment from electric power surges and spikes.Resettable circuit breaker:easy recovery from overloads no need to replace a fuse.Conveniencestatus indicator led's:led status indicators for each phase and an audible alarm provide immediate failure notification when surge suppression circuitry has been damaged by a heavy strike or surge.Transformer block spacing:connect bulky transformer block plugs without covering up other outlets.