Door alarm: Tower arms for safety at home 120 dB super loud alarm bells deter thieves and is more secure in use. Door handle alarm: door handle alarm simple operation, simple one-button control control door bell/alarm, double mode can be selected. Vibrations alarm system: Anti-theft turret If this alarm is installed in your house, office or work and you open the doors and windows of children or by theft, you will be alerted to check the safety. Door stopper security to stay in the hotel. You can install this alarm on the door and at the window. He protects you when checking out and takes the alarm for the next use. Doesn't need any special wire. Just hang yourself on the door knob, open the switch. The piercing alarm dampens unwanted intruders and lets them and their home well protected.