This warehouse doorbell kit comes with two chimes. Perfect for will-call counters, warehouse doors, and waiting areas, this wireless chime transmits to BOTH receiver chimes up to 2500' or 1/2 mile away. The warehouse door chime produces a soft ring and the button can be placed within easy reach of the customer in any commercial space or office environment. The chime features built-in audio volume control. The commercial door chimes plug into an ordinary electrical outlet and will play one of twelve different tunes selected. This complete commercial warehouse doorbell kit includes everything you need to easily install a warehouse door buzzer.