This item is window vibration alarm system, made with , practical and durable. Using your home to protect the safety of your property, that you can have a good sleep at night. Features - Color: White - Material: ABS. - Size: 7.00X7.00X0.95cm/2.75X2.75X0.37 inch. - Battery: 3 x LR44 1.5V battery (included). - Alarm time: About 80min. - Alarm power: 0.28W. - Standby time: 1 year. - Alarm decibels: 125dB. - Standby current: <=10uAh. - Adopted from , it is durable and use. - Comes with battery, energy saving and power saving, standby for up to 1 year without changing the battery. - Responsive, it produces a more than 125 when it vibrates. - It has a simple appearance, but has a practical function in use. - Perfect for using in your home to paste on the door, window, or just put it into your bag when you go outside. Package list: 1 x Window Alarm