Product Name: DoorbellModel Number: LD007-C6-1Place of Origin: ChinaFeatures: 1) Uses as a door bell, pager 2) Easy to install, no wiring 3) Operation range up to 15 - 20 meters 4) Battery operated 5) Transmitter: one E23A 12V (included) 6) Receiver: 4 x AA size (not included)