■ Outdoor warning distances of 30 m, 60 m, 80 m, 100 m ■ Digital Fuzzy Artificial recognition: quad-band FM, using artificial intelligence, fuzzy judge, the effective elimination of interference between radio, to prevent the omission ■ 2 beams simultaneously interdiction of detection methods, and down at the same time the two beams are interrupted only when an alarm signal output line, there will be no malfunction occurs ■ AGC loop (loop gain) when the leaves and other objects blocking a beam of light, in the rain, fog, Under the snow and other inclement weather, the loop gain is automatically adjusted sensitivity (up to 200 times), malfunction ■ A new optical system will not happen, for the first time using a wide-angle aspherical lenses in the industry, the small size, but the effective diameter is large ■ Unique seal design, waterproof, dustproof better voltage ■ LCD display, light is more convenient and accurate ■ dew, frost measures ultrasonic organizations to effectively prevent condensation, frost indeed