PHYSENWireless Doorbell, 3 Receivers, 300m, 1 Waterproof Button, Battery Operated, 58 Ringtones and 5 Volume Levels, LED Light for Entrance Door, Home, Office

Wireless Doorbell Kit, PHYSEN 400m Waterproof Plug in Doorbell Cordless, 3 Receivers + 1 Push Button, Door Bell Chime Kit with 5 Level Volume & LED Flash, 58 Chimes, Easy Install at Home & Apartment

LiCB 23A A23 12V Alkaline Battery (5PCS)

Sellotape SE3792 20mm x 20mm Sticky Fixer Outdoor