Sold as each. Switch to choose alarm or chime. Instant or delay entry detection. Magnet sensor. 12 volt replacement battery (not included) Replacement battery SKU # 3009743. 3 year warranty. Clamshell. Manufacturer number: S083K. SKU #: 5039953. Country of origin: China. Distributed by .

Product Features

• Built-in 110 db alarm
• Standard 9-volt battery operation (not included)
• Mounting hardware included
• Alarm or chime mode
• Comes with 2 warning sticker which can be placed at possible points of entry