1. Install each pair at the opposite positions.Then there is an infrared area between these two detector parts. When someone passes the infrared region, the detector will send alarm signal to the security alarm host
2. Install Distance (Max.) in the above chart means the maximum install distance between the two detector parts.
3. Great to be installed for security system in school, office building, hospital, home yard, etc.
4. Detecting range can be reduced to 30% in bad weather conditions, like rain, dust, etc.
5. English Usage Manual included in the pack. It will give you detailed instructions.
Detection Range: indoor 15m (50ft)
Work voltage:12V, 24V AC/DC
Work current: >25MA
Temperature: +50~ (-30)
Size: 49.2 x 76 x 21.6MM
Water Proof, UV proof