Model: DSA1 Color: Black + silver Material: Plastic + metal Sensitivity modes: High > Medium > Low Up to 120 dB high-pitched continuous siren when activated Wedge-shape design to fit any hinged door No installation need, easy to use Powered by 1 x 9V battery (not included) Widely used in home, office, hotel, etc. Dimension: 13.5*4.5*3.8cm,weight:99g Package: 22.5*12.5*4cm,weight: 131g