Brand: ADT-Link; Product name: M. 2 B-key WWAN 4G network card slot to SD 4.0 interface adapter board Specification: M. 2 B-key WWAN interface, size 30x42mm, adapter board supports SD 4.0 UHS-II Applicable equipment: SD card Product usage: it can convert the 4G network card slot that is not used in the notebook into an SD interface, this product is for transfer Chip specification: Genesys GL3232S USB 3.2 GEN1 to SD 4.0 Memory Card Reader Controller USB specification compliance Comply with Universal Serial Bus 3. 1 Specification ( USB 3.1 GEN1) Comply with Universal Serial Bus Specification rev. 2.0 (USB 2.0) Comply with USB Mass Storage Class Specification rev. 1.0 Support USB Mass Storage Class Bulk Only Transport (BOT) Support 1 device address and up to 3 endpoints: Control (0) / Bulk Data Read In (1) / Bulk Data Write Out (2) Support 5 Gbps SuperSpeed, 480 Mbps high speed, and 12 Mbps full speed transfer rates Integrated USB building blocks SuperSpeed US B/ USB 2.0 transceiver macro (UTM), Serial Interface Engine (SIE), and embedded P ower O n R eset (POR) Embedded high speed 8051 Mini controller High efficien cy hardware DMA engine improves data transfer performance between USB and flash card interfaces Support Se cure Digital TM v1.0 / v1.1 / v2.0/ SDHC / SDXC c apacity up to 2TB) Support Secure Digital TM v 3.0 UHS I (Ultra High Speed): SDR12/SDR25/SDR50/DDR50/SDR104 Support Secure Digital TM v 4.0 UHS II: Full Duplex Mode and Half Duplex Mode Support DDR200 speed mode to enhance the UHS-I performance Support SANDISK EXTREME 160 MB/s Micro-sd UHS-I CARD Support MultiMediaCard TM (MMC) Colour:Black Material:plastic Package Contents: 1 x Converter 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.