Add-On Doorbell for Wireless Doorbell and Intercom, Item# 333174, Model# OFD

Add-on doorbell for wireless doorbell and intercom, Item# 333174. U.S.A. Add-on doorbell for wireless doorbell and intercom, Item# 333174 Doorbell has distinct tone for both front and back doors Mounts to any surface with high-strength tape or screws (both included) Batteries work up to 2 years (not included) U.S.A.