Description This door sensoris solid and sturdy, which can withstand long-lasting use. Features the plastic and magnet material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. This door sensorwill make your home safer. Features -Color:White -Material:Plastic, magnet -Size:6.30X3.30X2.00cm/2.48X1.30X0.79in Battery: 3 x LR44 (not included) Sensing range: 8-15mm Volume: 130dB -The product is a door and window alarm contact sensor designed for home use. -It serves as a reminder when doors or windows are opened or closed. with its independent design, it functions as a standalone alarm system. -The device offers a variety of sound options, providing users with various alerts. -It ensures the safety and security of homes by acting as a magnetic theft alarm, alerting homeowners of any unauthorized entry. -Chic in look, simple in design and practical in use, give you a pleasant using experience. Packing list1 x set of sensors