HIIXHC Hiistar Personal Security Window & Door Alarm Bell Wireless Sensor Door Window Burglar Alarm Pack of 10

HIIXHC door window alarm 1.Super suitability and stability.100% New and high quality 2.Easy to use & User description: Magnetic sensor switch detects your door or window.Easy stick installation and operation.It only takes 3 steps： 1.insert 2 PCS AAA battery (battery do not contain in the box), 2.tear the double-sided adhesive on the backpack, paste the door knob alarm on your target position， 3.press on/off switch to power on/off.Note: When the distance between the doorbell and the magnetic sensor is greater than 0.59 inches, the doorbell will emit a sound of 90 decibels or more, to alert you or drive away thieves and protect your children HIIXHC door window alarm Package include : It comes in 10 packs Door window alarm, stable and dustproof.'