The OKY3277-1, manufactured by OKYSTAR, is a proximity sensor with infrared and 5VDC. It has a distance measurement range of 0.05 to 0.5 meters. It is designed for use in applications such as security, access control, and automation, and it utilizes ultrasonic technology to detect when objects are approaching or leaving. The sensing range is adjustable by adjusting the voltage input. The 2-wire or 4-wire connection options also make it convenient to use. Furthermore, it is designed with a small size and dustproof and waterproof environment.