251107-01 Product Dimensions: 34 length x 9 width x 99 height mm Batteries: Alkaline Number of Batteries: 3 Alkaline button batteries (included) Mounting Type: Window Mount/Door Mount TOKAIZ Security Alarm for Windows and Doors [Impact Detection + Opening Detection] 130dB Loud Volume, Waterproof, for Detached Houses, Intrusion Alarm, High-Precision Sensor, Security Buzzer, for Adults, Women, Children, Opening, Home Security, 1 Year Standby Time, THG-SA02 [Two-in-One for Peace of Mind] Equipped with both vibration detection and opening/closing detection. Instantly detects window abnormalities and provides complete security measures! [High-Precision Impact Detection] Reacts instantly to even slight impacts like "test openings," deterring suspicious individuals. [One Unit Covers Up to Two Windows] Simply install on one side to cover the entire window. Accurately detects vibrations over a wide area. [Three-Stage Sensitivity Adjustment] Prevents malfunctions caused by everyday vibrations such as rain, wind, and large vehicles. Operates reliably when needed! [120-130dB Blast Alarm] When activated, a 30-second loud alarm sounds! Cannot be stopped except manually, powerfully intimidating intruders. [Easy Installation, No Construction Required] Just stick it on with the included adhesive tape. Batteries are included, so you can use it right away!