Data will be saved after power failure.How to Use:1. Connect an external (button) and short circuit the KEY once to increase the count by 1.2. Each time you short circuit, the KEY position of the two solder points will increase by 1.3. To reset to 0, short circuit the two solder points of the KEY position while the power is on for 3 seconds, release immediately to clear to 0, and restoring the value to 0.PackageList:1 x Module [Flexibility in Application]: The counter can be used in a wide range of industries and applications, including manufacturing, process control, and automation systems. Counter Module Memory Function Real Time Monitoring 3 Bit Red Digital Display Module for Automation Systems (4-7V) : : Home Improvement[Easy to Use]: With its small size and simple application, this counter module offers different modes and guarantees reliable performance, stability, and long service life. [Accurate Counting Specification:Item Type: Counter ModuleMaterial: PCBPower Supply: Not automatically incremented upon power on. [Easy to Use]: With its small size and simple application, this counter module offers different modes and guarantees performance, stability, and long service life. Digital Display Module, Stable Red, Easy to Automation Systems DC 5V 12V 24V 10A Counter Module With Relay Output 0.36" Inch Digital Display EB Customer Counter Sensor [Real Time Monitoring]: The counter providesvisibility of event or input counts with real-time monitoring. Nils Snow 1/4-Zip Sweater (Women's) | Peter Glenn [Accurate Counting]: The counter ensures and accurate counting of events or inputs, providing measurement and control capabilities.