This dual kit comes with one end-of-driveway transmitter, two receiver chimes, and two "Original" Bells. The "Original" Bell is connected to the wireless chime with a two-strand low-voltage wire. 5â?? of two strand low-voltage wire is included with this bell kit. The driveway chime plugs into an ordinary electrical outlet and th"Original" Bellâ?? is connected to the wireless chime and gets its power from the chime. The end-of-driveway unit operates off of a 9-volt transistor battery. This chime kit includes all of the pieces necessary to set up your driveway alarm system. The driveway signal bell kit includes one end-of-driveway transmitter box, one heavy-duty rubber end cap, two wireless, electronic driveway chime alarms, two low-voltage â??Orig" Bellsâ??, two 5â?? lengths of two-strand, low-voltage wire, and one Milton driveway signal ho