¡ò High reliability¡¢International quality; ¡ò Selection of high-performance infrared transmit / receive geminate transistors; ¡ò New parasitic light wave filtering face-piece, effectively filter out parasitic light interference; ¡ò Optical axis can be adjusted all-round; ¡ò Collimator with high-precision configuration, improve the calibration rate of the optical axis; ¡ò LED status equipment, easy to install and detect.