Monarch Instrument DC-2C1-U4-10210 is a high-performance digital counter with a wide range of features and capabilities. It offers precise and reliable counting, with a maximum count rate of 10 MHz and a resolution of 10 ns. The counter has a large, easy-to-read display and a user-friendly interface, making it easy to operate. It also features a variety of input and output options, including RS-232, USB, and Ethernet, allowing for easy integration into various systems. Additionally, the counter has a rugged construction and is designed to withstand harsh industrial environments.