... barrier, 2 304 stainless steel, 3 anti-damp, dust-proofing outdoor optical double flap barrier pedistrain security product flap barrier Power consumption ... enviroment temperature minors 30C to 70 C Working environments indoor,outdoor Relative humidity ≤95% coagulation free MCBF 2,500,000 ... pass from opposite direction after reading the card.(optional) optical double flap barrier outdoor application