iMeshbean 433MHZ Wireless Motion PIR Infrared Sensor Detector For Alarm Security System USA Operating Frequency: 433MHz ; Operating Voltage: 12V Detecting distance: 10m ;Detecting angle:110 degrees" Automatically temp. compensation,anti-RFI & anti-EMI; Power: 9V Heavy Duty Battery Low power indication, adjustable time for,alarm delay,detecting distance adjustable