The OKY3265 is an ultrasonic distance sensor manufactured by OKYSTAR. It measures distance and is powered by a 5-volt DC power supply. It is capable of measuring distances between 0 and 4.5 meters with an accuracy of 0.3 cm. The sensor is compatible with a variety of mounting styles, including through-hole, screw mounting, and adhesive mounting. It is also available with an adjustable cut-off frequency so the user can customize the ultrasonic frequency range. It has an adjustable signal strength, which ensures that it functions properly in any environment. The sensor is also protected from interference and static electricity. The OKY3265 can be used with Arduino boards for a wide range of applications, including proximity detection, obstacle avoidance, physical computing, and robotics.