Infrared Frequancy : 1.92khz Power supply : 12 to 24 VDC /AC Wave length :940nm Input : r*15ma - t*30ma operating temperature : -20 degrees to 180degrees Relay output : 1 a max *36 v Range : range can be reduced to 30% in bad weather conditions : for rain ,dust ,etc   Single beam photocell sensor/single beam detector is used for automatic slide door, coil door , garage door windows etc. Consists of a transmitter and a receiver, and the integrated amplifier can produce infrared beam. Narrow infrared beam (I or II) can avoid interruption by external light. Even installed at low height(20-40cm from the floor), the detecting distance can also be guaranteed(5-15meters).     Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-WuhanGQ shop 3