SECRUI Wireless Door Open Sensor Alarm Chime, 500ft Operating Range 52 Chimes Adjustable Volume with Mute Mode LED Indicators 1 Plug-in Receiver 2 Magnetic Door Alarm Sensor for Home Store Security

SECRUI Wireless Door Open Sensor Alarm Chime, 500ft Operating Range 52 Chimes Adjustable Volume with Mute Mode LED Indicators 1 Plug-in Receiver 2 Magnetic Door Alarm Sensor for Home Store Security

DURACELL MN21 (2 Pack) Specialty Alkaline Battery 12V (A23/23A/V23GA/LRV08/8LR932) – Long life guarantee – For Remotes, Wireless Doorbells, Security Systems – 5–Year Storage Guarantee -Leak Prevention