?This First Alert Dual-Source Rectangular Infrared Detector White with high reliability£¬ strong anti-interference and self-examination function£¬ is a simple but functional detector for you to detect the intruder via doors and windows! With digital processor£¬ it can filter activities of non-object signals and RFI / EMI signals£¬ so as to reduce the false alarm rate of the system. In addition£¬ it offers high detection speed and wide detection range for your needs. Furthermore£¬ this device is lightweight and easy-to-install. Believe it and that's a good choice for you!                                    Features            New and high quality<br>High detection speed£¬ wide detection range<br>With self-examination function<br>With digital processor£¬ can filter activities of non-object signals and RFI / EMI signals<br>Simple design£¬ and functional<br>Light weight£¬ easy to install<br>                                                              Specifications                        Sensors type          Dual-source rectangular infrared        <br>          Detection range          11m x 90¡ã (standard lens)        <br>          Antenna type          Planar antenna        <br>          Digital filter          50 / 60Hz        <br>          Self-examination          With microwave self-detection-off function        <br>          Input voltage          10 - 16V DC 30mA        <br>          Detection speed          0.2 - 7 miles / sec        <br>          Install haight          2.1 miles        <br>          Weight          160g        <br>          Size          2.60" x 5" x 2.05"        <br>          Color          White        <br>                                                              Package Includes            1 x First Alert Dual-Source Rectangular Infrared Detector White<br>