Mini PCI-E Wireless WWAN to USB Adapter Card with SIM Card Slot Module Testing Tools The adapter cannot work if you only plug in the sim card. The adapter has integrated with a SIM card slot and 1 or 2 WWAN antenna. Mini PCI-E to USB Port 52PIN with SIM Slot Module Ideal for testing the WWAN cards. You don't need to break or open your laptop to test your WWAN modules. has integrated with a SIM card slot and 1 or 2 WWAN antenna It can work with most of WWAN modules. Very easy to use. Don't need extra drivers. Just make sure you have installed the drivers & software for your WWAN card. It work with desktop computer and laptop computer with WINDOWS OS (XP & VISTA). With SIM/UIM card slot at the switch interface, it enables you to use 3G module directly when SIM card installed.