describe Product Access control alarm, 120DB siren, door anti-theft wedge, anti-theft door block, anti-theft thief, suitable for family residence hotel, university travel hotel room, super loud and portable. Dual Function- This alarm can be door stop alarm or door stop. A 120 decibel alarm sounds when the button is pressed. It can also be used as a normal door stop when the ON/OFF switch is pressed, and its high damping rubber bearing prevents the door from sliding. 120dB Siren- When door pressure is applied, the very loud 120dB siren helps to wake up/alert homeowners or tenants, help deter intruders, and possibly notify neighbors (heard within 300ft/1000ft). You can also press the alarm to scare off intruders when you are in danger. [3 sensitivity levels, easy to use] - High/medium/low sensitivity can be turned off by the adjustable sensitivity switch on the side. No installation required, just place the door burglar alarm under the door (house, hotel, etc.) and turn on the switch. [Premium] - Stainless Steel Wear Cover. They have been rigorously tested to prove they are safe to use. The access alarm is powered by 9V battery and can be used for one year under normal circumstances. (Note: no battery)Practical and Portable-Small size, convenient for travel or business trip. It is very convenient to carry when traveling or at home alone. They can be installed under any door 0.1 to 1.5 inches from the floor. Doorstop alarms provide a practical and inexpensive way to help protect yourself and your property. Whether youre alone or not, youll sleep better knowing that a door siren can provide a barrier between you and any egregious sounds happening outside your bedroom. There are three gauge pressure sensors. You can adjust it according to your needs. -Access alarms are a great solution to help augment existing home alarm systems or stand alone in bedrooms, dorms, hotel rooms or apartments. The siren can be heard up to 120 decibels from 1,000 feet away (the length of a standard size football field) and sounds when door pressure is applied. Likewise, anti-skid pads help keep the door from opening. - The doorstop is battery powered, with built-in siren, powered by a 9V battery (not included). It does not require any wiring or complicated installation. Just open it up and place it firmly behind the inward-opening door, and set the Dorm Stop Alarm in seconds. Doorstop alarms work on nearly all floor surfaces, including carpet. - This handy gadget is perfect for bedrooms, apartments and dorms, and hotel rooms when traveling. The compact and portable design makes it the perfect travel companion. Easily stow away in a travel bag, suitcase, briefcase or backpack for extra protection on the go. Personal self-defense equipment when traveling at home or in hotels. Package: 1*Door Stop Alarm (9V battery not included) Category: Home Alarm System