?The YH-804C Wireless Passive Infrared Motion Sensor Detector is designed to detect motion from human up to about 12m away£¬ with pet immunity up to 11kg. It utilizes advanced Passive Infrared (PIR) technology to detect an infrared-emitting source that causes a rapid temperature change compared to the surroundings. And it is built with an anti-tamper switch. When the switch is on£¬ the detector will give out alarm when someone temps to damage it. Moreover£¬ its slim contemporary design compliments any decor. Click and order now!                                    Features             Secure your home from intruders<br> Alert you via a piercing alarm and an LED indicator<br> Utilize advanced Passive Infrared (PIR) technology<br> Designed to detect motion from human up to about 12m away<br> Built with pet immunity up to 11kg<br> Built with an anti-tamper switch<br> Slim contemporary design£¬ stable performance <br>                                                            Specifications             Infrared Sensor Type     Dual Elements PIR Sensor    <br> Auto Temperature Compensation     NTC Compensation    <br> Detecting Distance     12m    <br> Detecting Angle     110¡ã  Others    <br> Operating Temperature     -20-+50¡æ    <br> Power Input     DC 12V    <br> Detecting Speed     0.2-7m/sec    <br> Installation Height     Approximate 7.22ft / 2.2m    <br> Alarm Indicator     Red LED Light(Close if Need)    <br> Alarm Output     N.C.£¬ 28V DC£¬0.15A    <br> Anti-tamper Switch     N.C.£¬ 28V DC£¬0.15A    <br> Operating Humidity     ¡Ü95%    <br> Color     White    <br> Weight     2.4oz / 68g    <br> Material     Plastic    <br> Dimensions     (4.13 x 2.36 x 1.18)" / (10.5 x 6 x 3)cm (L x W x H)    <br> Pet Immunity     388oz / 11kg or Less     <br>                                                             Package Includes            1 x Detector<br>1 x Manual<br>1 x Screws Pack<br>