Window/Door Vibration/Shock Sensor Anti-Theft Security Alarm (4 x LR44)

- Easy to install and operate - Works as a home/office/store security alarm - Powered by 4 x LR44 batteries (included) - Comes with Chinese manual Dimensions: 2.56 in x 2.56 in x 1.02 in (6.5 cm x 6.5 cm x 2.6 cm) Weight: 1.59 oz (45 g)