Product model: R45B Product Name: M.2 B&M-key to B-key 3G/4G/5G Network Card Module Adapter Card Product application: Supports mainboard M.2 slot size with 2280 M-key interface, network module with 3042 size and 3052 size B key interface, adapter purpose (this product supports PCIe network card module by default, if your device is a USB network card module, you need to use the included USB cable to connect to the mainboard). The network information of the nanoSIM card can be recognized (the network module needs to be used in conjunction, network module not inlcuded). NOTE: Excluding network module, SIM card, and antenna Operating temperature: -40 to 80 Operating voltage: Only 3.3V is supported(Please confirm the working voltage of your 5G module by yourself.) Flame retardant grade: 94V0 Purchase restrictions:This product is specially designed and difficult to install and configure. It is only available for purchase by professional engineers as specified. Please confirm the specifications clearly before placing an order. SATA protocol is not supported. Color: Black Material: PCB Package Contents: 1 * M.2 B & M-key 2280 to B-key Adapter 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.