This 30 Meters Three-beam Infrared Style Photoelectric Detector￡? with special optics￡? digital and imported filter has strong anti-interfence and high reliability. Beautiful and reliability of the structure the crust is mainly high quality alnico material the surface is with sprout and mould disposal. Standard output interface￡? fit for all alarms￡? such as doors￡? windows￡? balconies￡? communities and parks￡? etc.                                    Features                        Aptitude judgment          When the theft comes two or more infrared￡? which over 40ms will  into the protective district￡? it stop the  give out the alarm￡? Can effectively prevent  the traditionally wrong alarm deficiencies        <br>          Recognize object          Can distinguish the size of the traversing object￡? when the lawless intruder came it will give the alarm￡? it doesn&acute;t happen when the intruder is a cat or a dog. You do not bother to open the window        <br>          Good reliabilities          Anti-cutting function disturbs technology. Prevent the intruder adopt deceive or destroy ways        <br>          Anti-rain-wet          Anti-rain function can be used out door of wet places        <br>          Firmed durable          Import filtrate flake filtrate visible light        <br>          Install and debug easily          When the installation seat in faxed it can be revolved 360?/td>    <br>          The protect grade can be changed          The user can chose the protect grade￡? strict protect grade. Ordinarily grade        <br>                                                               Specifications                        Power          DC 12 - 18V        <br>          Alarm speed          Alarm time ?￠a€°??1.5sec        <br>          Tomuch off time          40 ms        <br>                                                              Package Includes            2 x 30 Meters Three-beam Infrared Style Photoelectric Detector<br>1 x Installation Accessories<br>