Hikvision DS-PS1-B – Sound Decibel: 105dB at 30cm

Modern design – Delivers a small and sleek detection solution; providing a modern yet unobtrusive finish to complement any room.;
Detection range – Up to 18m volumetric detection coverage, the Ellipse is the ideal solution for any small to large indoor rooms and spaces.;
Digital temperature compensation – Digitally adjusts its sensitivity to maintain its specified range when the background temperature is close to body temperature.;