Single beam infrared radiation: suitable for anti-theft such as doors and windows, box, fence and so on. Small size, big effect Sealed shell, stronger waterproof: Thanks to the good waterproof design, it can effectively cope with all kinds of bad weather, so that the internal components are not eroded by rain Detection distance 20m: Install to ensure that the emitter and the receiver are on the same horizontal line Stable and reliable anti-interference: using hemispherical optical lens, the beam is concentrated, precise and non-scattering, and the automatic strong light adjustment system can effectively avoid the interference of strong light and car headlights Specifications Light source mode: infrared pulse type Detection method: Beam interruption pick-up type Package Include:1 Pair X Alarm Sensor Note: Due to different personal measurement methods, there will be an error of 2-4 cm, please understand Thanks for your support When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please dont hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it