OLEY Adapter Mini PCI-E PCI Express to USB Interface with SIM Card Slot (180 Degree) Special Statement: This Mini Pcie board is the adapter plate, MniniPCI-E turn into USB, not 3G, 4G card, this product does not contain 3G, 4G module, if there is no 3G, 4G module, can not access to the Internet! Increase the fixed latch module for users to install and easy to improve the reliability and stability of the module operation.PCB adds four screw holes, so that this adapter can be used for small industrial chassis. Increasing the SIM card holder and rear components distance, so that the user removable SIM card is more convenient Working principle: Mini PCI-E52pin Interface definition USB signal and 3.3V voltage, the adapter through LDO that converted the USB interface 5V voltage to 3.3V, supply module and USIM / SIM work, the bus signal is USB signal This configuration may also be useful for attaching/soldering the cable wires directly to the USB contacts or circuity on a router/PCB for custom builds and designs. This adapter is not compatible with a WiFi module.