Description:Loud sound: This door open close detector can make a 130dB alarm sound that can remind people and attract others attention.Application: This window door sensor can detect the close and open status, and when the window or door be opened, it will make an alarm.Long standby time: This window security alarm has 3 LR44 button batteries and the device features a low power consumption.Fits place: This window alarm sensor is a good fit for home, office, store, shop, warehouse, garage, and many other places.Simple installation: This door sensor is convenient to install and use, just apply it on a frame of door or window, no need for any special tools.Specification:Working current: 100mAh.Volume: 130.Working voltage: 4.5V.Color: White.Material: ABS.Battery: 3x LR44 button battery(Included).Sensing range: 8-15mm.Standby current: 6uAh.Door sensor size(LxWxH): Approx. 63x34x16.5mm/2.48x1.34x0.65 inch.Strip size(LxWxH): Approx. 36x10x14mm/1.42x0.39x0.55 inch.Note:There might be a bit of color distortions due to different computer resolutions.There might be a slight error due to different hand measurements.Package Includes:1 Piece Door Sensor.