CARRY WITH CONFIDENCE AND BE PREPARED: With 25 bursts for protection against multiple threats and 12-foot (4 meter) rangeFASTER, EASIER, MORE ACCURATE: Twist lock safety helps to prevent accidental discharge for safe storage; Finger grip enhances your grasp and aim so you can keep your eyes on the threatATTENTION-GRABBING: When door pressure is applied, the extremely loud 120 dB alarm helps wake/alert homeowner or renter, helps deter intruder and possibly notifies neighbors (audible up to 1,000 feet/300 meters away)VERSATILE WITH MAXIMUM SECURITY: Features a non-skid pad to prevent door from opening while alarm sounds. Also makes a great travel alarm for hotelsEASY INSTALLATION: No wiring needed; battery-operated (requires 1x9V battery); small Philips Head number 1 screwdriver required to remove battery compartment cover