1The siren can receive signals from other 433MHZ frequency detectors for alarm. 280dB super loud siren, built-in LED strobe light, strong alarm function. 3Low false positive, dual infrared detection components and micro-processing chip, high intelligence and high sensitivity. 4Wireless door magnetic sensor features anti-theft infrared alarm for home door and window, with emergency button. 5Ultra low power microprocessor, dual temperature compensation technology.Features:Sensor:The siren can receive signals from other 433MHZ frequency detectors for alarm.80dB super loud siren, built-in LED strobe light, strong alarm function.Wireless Infrared Sensor:Low false positive, dual infrared detection components and micro-processing chip, high intelligence and high sensitivity.The farthest detection distance is 12 meters; the wireless transmitting distance can reach 80 meters.The detection angle is 110 horizontally and 60 vertically.Presented with a universal mounting bracket, built-in 4 AAA batteries.Wireless Door Magnetic Sensor:The transmission frequency of the door magnetic sensor is 433MHZ. It can not be used alone and must be used with 433MHZ alarm host.Wireless door magnetic sensor features anti-theft infrared alarm for home door and window, with emergency button.Ultra low power microprocessor, dual temperature compensation technology.Rugged and durable, suitable for homes, offices, sheds, garages, etc.Built-in CR2032 button battery for easy wall-mounted installation.Specifications:Condition: Brand NewMaterial: ABSColor: Shown as pictureSiren:Plug Type: EU 100-230VFrequency: 433MHZDistance: 80mSound size: 80dBLight: Built-in 5050 LED strobe lightHeight: Approx.7cm/2.8inDiameter: Approx.7cm/2.8inWireless Infrared Sensor (HW-03D):Frequency: 433MHZMaximum Detection Distance: 12mWireless Transmitting Distance: Up to 80mDetection Angle: Horizontally 110, vertically 60Battery: Built-in 4 AAA batteriesSize: Approx.11*5.5*3cm/4.3*2.2*1.2inWireless Door/Window Magnetic Sensor (MC-03B):Transmitting Frequency: 433MHZBattery: Built-in 1 CR2032 button batterySize: Approx.8*3*1cm/3.1*1.2*0.4inPackage List: