Feature: 1. Maximum interval range of radiation is about 20m/65.62ft, with the detection range of 135 degree. 2. With the function of alarm, it will issue an alarm when an obstacle is encountered. 3. The best height of installation is more than 20cm/7.87in, and the distance of installation should be no less than 2m/6.56ft. 4. Used in door control, anti-clip, sales store/small supermarket/convenience store welcoming, various road gates, anti-smashing/cars, gates, automatic doors, villa doors, swing doors, etc. 5. Stable characteristics, professional performance, and has high reliability. Specification: Item Type: Infrared sensor Condition: Brand new Material: ABS Color: Black Infrared Sensor Technology: Active infrared radiation Receiver: Range: ≤20m/65.62ft(The distance will be reduced by 30%, when in bad weather such as heavy rain or fog.) Frequency of Infrared Emission: 1.92Khz Input Power: DC/AC 12-24V Wavelength: 940nm Input Current: RX 15mA-TX 30 mA Angle of Incidence:< ±10° Use Environment: -20 ° C -70 ° C Maximum Load: 1A maximum 30V Size: Approx.110x36x35mm/4.33x1.42x1.38in Application: Used in door control anti-clip, sales store/small supermarket/convenience store welcoming, various road gates anti-smashing/car, gates, automatic doors, villa doors, swing doors, etc. Best Height of Installation: More than 20cm/7.87in Installation Distance: More than 2m/6.56ft Detection Range: 135 degree . Package List: 1 x Pair of Infrared Sensor1 x Pack of Screws1 x Instruction Manual Note: 1. Due to the high transmission power of this product, there will be no reaction when the transmitter and receiver are too close. You should pull them apart for at least 1m/3.28ft and try it again. 2. When installing distance is very close and has the insensitivity phenomenon, the concentrating lens in the transmitting and receiving can be removed to enhance the sensitivity.