Converts unused M.2 B-key WWAN 4G card slots in laptops into USB 3.0 ports, allowing for enhanced connectivity options. Ultra-thin design accommodates larger devices such as USB drives, Wi-Fi adapters, and Bluetooth-compatible devices, maximizing space efficiency. Built-in power module supports a minimum of 5V/2A current, ensuring reliable operation for high-performance USB devices with significant power requirements. Compatible exclusively with M.2 B-key interfaces; other M.2 A, E, and M-key interfaces are not supported due to differing pin definitions. The M.2B-key WWAN 4G Network Card Slot to USB 3.0 Interface Adapter Board is designed for professional engineers looking to repurpose unused 4G card slots in laptops. With dimensions of 30x42mm and 30x52mm, this adapter board supports USB 3.0, making it ideal for connecting USB devices. Before purchasing, compatibility with your laptop's specifications and space limitations. Color: Black Material: PCB Package Contents: 1* M.2 B-KEY to USB3.0 Adapter Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.