Welcome to our store! 1. Easy Operation: When the signal receives the set times, the relay is closed, which can connect to the alarm, and you need to manually press the middle reset button before disconnecting. 2. Counting Range: Allows for a wide counting range from 1 to 999999, the digital counter makes counting much easier. 3. Free Connection: Equipped with NPN and PNP signal input ports, it can be flexibly connected to power supplies, buttons, etc. 4. Comprehensive Use: Safe and reliable work with stability allows for broad application in equipment upgrades and DIY projects. 5. More Convenience: Both maintenance and installation are very convenient, saving time and labor as well. Item Type: Digital Counter Product Model: YF-16 Input Voltage: 5~24V DC, 5~24V AC (all available). Counting Range: 1~999999 times Wiring Port Instructions: 1. AC DC +, -: Power supply; 2. NPN: NPN signal input; (can connect to power supply negative pole, button, sensor trigger, etc.) 3. PNP: PNP signal input; (can connect to power supply positive pole, button, sensor trigger, etc.) 4. Output: The output is the passive contact switch value of the relay. 1 x Digital Counter Your 100% satisfaction is our top priority. We will provide you with the best service. If you encounter any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!