Features Reliable Memory Function: Retain crucial data even during power outages, ensuring uninterrupted operation and peace of mind for your projects Clear 4-Digit Display: Easily read values ranging from 0 to 9999, enhancing user experience and precision in monitoring your electrical equipment Versatile Voltage Support: Operates efficiently within a DC voltage range of 4-40V, making it suitable for various electrical supplies and applications Durable Electronic Components: Built to last with high-quality components, ensuring accuracy and longevity for all your counter module needs User-Friendly Features: Includes accumulated +1, clear, and power-off data memory functions for effortless usage and management of your electrical projects Features: 1、The product has memory function, the data will not lose when power off 2、With 4-digit digital display, the display range is 0-9999 3、Wide voltage , support DC4-40V 4、Adopted of electronic components, and accuracy proc, ensure for the durability 5、With accumulated +1, clear, power off data memory function Specification: Item Type: Counter Module Working Voltage: DC 4-40V 4-digit Counter Counting Range: 0-9999 Package List: 1 x Module Note: betweendiv>1. External sensor must be NPN normally openbetween/div>betweendiv>2. The positive pole of the module is connected to the positive pole of the power cord, the other is connected to the negativebetween/div> Package List 1 x Module