Whistler PRO-RS01 Power Inverter Remote On/Off Switch Allows You To Operate Your Power Inverter From A Distance Includes A 6-Foot Cord Exclusively Compatible With Whistler Pro Series Power Inverter Models Will Not Work With Inverters Requiring P/N 401009 And P/N 401039 Over The Past Four Decades Whistler Has Built A Brand That Stands For Quality, Innovation And Proven Performance