Guard Dog Security Door Keeper with Alarm Blue

3-in-1 FULLY PROTECTED: This advanced Guard Dog Security Door Keeper includes a premium multi-height door keeper, removable yoke for sliding patio door use and alarming 100db vibration sensitive alert. EXTREMELY LOUD: With a HIGH sensitive alarm, this door keeper will deter an intruder and alert you up to 1000 ft away in the event of an unwelcome entry attempt to your home, door or patio door. ADJUSTABLE: Door Keeper adjusts from 25 in (63.5 cm) to 41.5 in (105.4 cm) with 40 different positions to adjust most hinged and sliding doors. IMPROVED DESIGN: Angled and squared rubber bottom assures full contact and strong grip on all types of floors without scratching them.