USB 2.0 Speed FourPort Hub Module Functionality: USB 2.0 speed fourport hub module for extending USB connectivity in compact boards and devices. Size: 29.5 mm long, 18.9 mm wide, 4.8 mm (L x W x H). Power connection: Power input port reserved at the upper left corner of the board, indicating the position of 5Vin. Performance: speed and stable operation with low heat and low power consumption. Compatibility: Designed for USB 2.0 devices and suitable for integration into embedded systems and development boards. Applications and use scenarios Embedded systems and microcontroller projects that require multiple USB peripherals (keyboard, mouse, USB flash drive, sensors) in a small form factor. Development boards and prototyping setups where compact USB expansion is needed without adding bulk. Small electronics products that need four USB 2.0 connections while prioritizing low heat and power usage. Notes The description preserves the original function, size, and power indication details without adding specifications.