Door Step Alarm for sale

Color: silver and black (as shown in the pictures), material: stainless steel cover and small size, working modes: vibration sensor, volume of the alarm: 125 db, three sensitivity: high, medium, low, battery: 1*9v battery, size: 135*45*40mm, net weight: 294g, 100% brand new and high quality guarantee.
this door wedge can be easily applied to closed doors, when the door is opened it will activate an alarm alerting you of a possible security breach. door stop alarm & door stopper keep intruders out, also prevent the doorknob from hitting the wall. high- quality: made of high damping rubber & abs plastic, very convenient to use. loud alarm: 120db loud alarm sound could scare intruder. portable alert 3 sensitivity levels: low - medium - high, with an adjustable sensitivity switch on the side. easy to install: portable and easy way to add piece of mind when traveling or working alone. widely use: can be used in home, dorm, office hotel, motel & more.