Potable Anti-Theft Block Burglar Door Stop Alarm Security System With Battery

This is an upgrade door stop than others. It is more durable than others with better quality. 3 Sensitivity Levels - Low - Medium - High, with an adjustable sensitivity switch on the side. Very loud shrill that would definitely scare someone away with 120db alarm. Weight: 128g .You can use it as common door stopper when turn down the ON/OFF switch, hold door in open position. No installation required. Requires one 9 volt battery .Portable and easy way to add piece of mind when traveling or working alone.