Transmitter works with your existing doorbell chime. Just wire the transmitter to it. The doorbell is activated by same current that operates chime. May be used with any Silent Call receiver.
Velcro brand fastener included to easily attach the doorbell transmitter to the wall next to the chime or to the chime unit cover. Never install the doorbell transmitter on a metal door, as this can cause interference or shorten the range. 5-Year Mfg Warranty.