1 9V batteries required.
SABRE HS-DSA Wedge Door Stop Security Alarm with 120 dB Siren — Great for Home, Travel, Apartment or Dorm
Make sure this fitsby entering your model number. ATTENTION-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/300M away) VERSATILE WITH MAXIMUM SECURITY – features a non-skid pad to prevent door from opening while alarm sounds; ideal for bedrooms, hotels, apartments, dorm rooms, front doors, etc. - great travel alarm