Features: 1. New 2 beams active infrared detector 2. Used for wall,passage etc. 3. Anti-glare up to 50,000 LUX, built-in automatic adjustment strong light filtering system 4. Up and down optical lens can adjust the mechanical design,making adjustments more faster,convenient and accurate. 5. Fully sealed design,rain-proof(fog),dust-proof(worm) 6. With high levels of anti-RFI/EMI capability 7. Professional anti-jamming optical housing