Azonee Loud Flash Doorbell with 7 Colors of Bright Light and 4 Volumes, The Deaf/Hard of Hearing Favorite Music, Ring Doorbell Wireless with Sound LED Flash Door Bell for Home

Duracell High Power Lithium CR2 Battery 3 V, Pack of 2 (CR15H270) Designed for Use in Sensors, Keyless Locks, Photo Flash and Flashlights

Sky-Touch Wireless Doorbell, Waterproof Wireless Doorbell Kit With 36 Bells And AdjUStable Volume; With Sound And Led Home Door Bell Chime (1 Receiver And 1 Pressure Button)