Sell Door Stop Security Alarm Portable Door Lock for Traveling Home Apartment Doorstop Safety Tools Door4 best price

DUAL FUNCTION - When the door stop alarm is in the "on" state, it can deter intruder and trigger the alarm sound.When it is in the "off" state, it acts as common door wedge,its high damping rubber prevents the door from sliding and keeps the door in the open position. 3 SENSITIVITY LEVELS - Hige-Midium- Low Sensitivities,with an adjustable sensitivity switch on the side easily change the mode.Smooth floor can try to use H-type sensitivity,vibration-sensing alarm. EASY TO USE - No wiring needed, just put 1x9V battery (Note: not include) in ,place it under the door,the gap bewteen the bottom of the door and the floor should be 10mm(0.38 in) to 35mm(1.35 in)and switch the button on the back to “ON” then it can works. LOUD ALARM - When the baffle is stressed,it will trigger a loud and harsh 120db alarm, which is enough to easily remind or wake up the homeowner, scare off intruders and possibly notify neighbors. LIGHTWEIGHT & EASY TO CARRY - Each door alarm weighs 100g, the size is only half the size of a palm. It is convenient to carry and is very suitable for travel, apartment, home, etc., to protect you when traveling or working alone.A protector who really must be around you.