Look at the silkscreen (the text printed on the board itself). You will likely see something like "Willem PCB50, PCB5.0, PCB5.5, or GQ-4X.
netsh int ip reset
netsh winsock reset
netsh wlan delete profile name=* /interface=*
ipconfig /release
ipconfig /renew
Use Wireless Diagnostics hidden in /System/Library/CoreServices/Applications/. Hold Option + Click Wi-Fi icon → Open Wireless Diagnostics. The logs (/var/log/wifi.log) are your best friend.