DOBERMAN SECURITY Ultra-Slim Window Alarm 2 PACK with Loud 100dB Alarm and Vibration Sensors &ndash; Modern & Ultra-Thin Design Compatible with Virtually Any Window &ndash; Perfect for Home, Office, Dorm Room or Even RVs &ndash; Model SE-0106-2PK DETECTS WINDOW VIBRATION  Instantly alerts you of a potential break in with loud 100 dB alarm UNIQUE ULTRA-SLIM DESIGN  Perfect for your home, office, garage, dorm room, or even RV VIBRATION TRIGGER TECHNOLOGY  Built-in vibration sensor perfectly tuned  will not go off in rain, wind, etc. NO FALSE ALARMS EASY INSTALLATION  Simply peel and stick, no tools needed. Warning sticker on backside deters theft INCLUDES 3 BUTTON CELL BATTERIES (LR44)