Specification BatteriesRequired : 1 Brand : Hdnsiyo BulletPoint1 : Super loud 90 dB alarm – This Magnetic sensor window door alarm loud enough to detect entry, prevent kids and babies going out the house, protecting your home or office whether you are in or out. BulletPoint2 : Magnetic sensor switch detects your door or window. When someone opens the door or window illegally (the relative position of the primary and secondary parts changes), the alarm can issue a strong alarm, warning the intruder to leave and remind the owner. BulletPoint3 : EASY INSTALLATION - Easy stick installation and operation, press on/off switch to power on/off then insert 2 PCS AAA battery (battery do not contain in the box),tear the double-sided adhesive on the back, paste the door knob alarm on your target position. (NOTICE: MAKE SURE THE GAP BETWEEN THE ALARM AND MAGNET PART WITHIN 0.6IN.) BulletPoint4 : ULTRA-SLIM DESIGN - Size: 3.6" x 1.2" x 0.8", this door and window alarm with 2 adjustable settings (on/off). Perfect for home, office, garage, dorm room, apartment or even RV. BulletPoint5 : WHAT YOU GET – 13 packs super environmentally suitable, stable, dustproof window door alarms, 100% customer satisfaction service, value for your money, any questions, do contact us for help! We are always here to help you out. Color : Pack of 13 CompatibleDevices : Door and Window ControllerType : Hand Control ControlMethod : touch ControlMethod1 : touch ControlMethod2 : application CustomerPackageType : Standard Packaging ExternallyAssignedProductIdentifier1 : 782931027096 ExternallyAssignedProductIdentifier2 : 0782931027096 ExternallyAssignedProductIdentifier3 : 04003318532702 FinishType : Polished IncludedComponents : Key IncludedComponents1 : 13 x Magnetic Sensor IncludedComponents2 : 13 x Magnetic Stick IncludedComponents3 : (Batteries not included) ItemName : Personal Security Window & Door Alarm Bell | Wireless Sensor Door Window Burglar Alarm | Pack of 13 ItemPackageDimensions_Height : 29.3878 centimeters ItemPackageDimensions_Length : 7.493 centimeters ItemPackageDimensions_Width : 21.8948 centimeters ItemPackageQuantity : 1 ItemShape : Oval ItemTypeKeyword : home-security-systems Language : english LockType : Key Lock Manufacturer : Hdnsiyo Material : abs Material1 : Stainless Steel Material2 : Steel ModelName : Door/window alarm ModelNumber : Hdnsiyo MountingType : Window and Door Mount NoiseLevel : 90 decibels NumberOfItems : 13 NumberOfPieces : 1 PackageLevel : unit PartNumber : Hdnsiyo PowerSourceType : Battery Powered ProductDescription : Home Security Systems, Door Window Alarm, Door Alarms for Kids Safety, Window Pool Alarms ,door sensor ,window alarm door alarm ProductSiteLaunchDate : 2021-08-28T01:02:42.567Z RecommendedUsesForProduct : Indoor Style : EK SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 13 Voltage : 1.5 volts