Our most popular Warehouse & Business Entry and Doorbell Kit. Power through the steel, concrete, and other building materials present in commercial applications with a range of 4,000 feet. This wireless warehouse door chime receiver features 4 x 12V DC outputs allowing the use of a variety of different accessories, including strobes (siren, buzzer, etc.), sirens, bells, etc., for each zone. Pair up to 12 transmitters (push buttons, door contacts, motion sensor, or outdoor driveway sensor). Use as many receiver chimes as necessary to hear the alert in multiple locations.