DITEK DTK-DF240S12 Sets a new standard for multi-circuit 240VAC power surge protection. Its patented design provides maximum critical load protection by minimizing AC supply voltage spikes and isolating incoming surges that originate from lightning or other sources. Each DF Series module features an LED health status indicator that flashes and sounds an audible alarm when protection has been compromised and the wall-mountable enclosure includes dry contacts for remote notification when service is required.