Features: Brand new and high quality. This is an industrial expansion module for RPi Compute Module 4 Lite/eMMC series modules, featuring a UPS module. It offers standard interfaces like USB and GPIO, allowing connection of additional 4G/5G wireless communication modules via M.2 or Mini PCIe sockets. It also includes industrial interfaces/resources such as RS485 and CAN. Combined with an industrial DIN rail mounting protective cover, this module is an excellent choice for building IoT gateways, 4G/5G routers, IoT data acquisition systems, or even devices in industrial automatic control systems. It can charge batteries while simultaneously powering the system from an external source. It automatically switches to battery power when external power is unavailable, ensuring smooth system operation. Suitable for Internet of Things gateways, 4G/5G routers, IoT data acquisition and monitoring, industrial automation, and other industrial applications. The UPS module ensures continuous system operation after power disconnection. Specifications: Material: Plastic UPS Power: UPS module, 5V/2.5A output, supports 3x 10440 batteries (not included). USB: 3x USB 2.0 Pin Header: 2x unisolated RS485, 1x unisolated CAN, partial GPIO pins. Fan Header: 5V/12V, supports speed adjustment and measurement. Power Input: 5V or 7-36V Size: Approx. 145x90x40mm / 5.7x3.54x1.57 inches Note: Please allow 1-2 cm error due to manual measurement; ensure you don't mind before ordering. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes: 1 Set of Expansion Board