This product adopts imported single-chip microcomputer programming, accurate sampling, strong anti-interference, and integrates multiple functions. It can be used for counting, metering, timing, tired time, speed, frequency, etc., with 32 subdivision functions and 5 relay actions. The method is optional, the opening size is 45*45mm, the conventional shipping is 220V, and the power supply can be customized to DC24V, which has a wide range of applications and simple operation.