The Flexy FLB3271 expansion card gives a flexy basic module a Wifi 802.11 bgn WAN modem that allows the Flexy to be adapted even more to your specific needs.
The Flexy FLA3301 expansion card provides a flexy basic module with 2 additional RS232 / 485 ports that can be used to adjust the Flexy even more to your specific needs.
The Flexy FLX3101 expansion card gives a flexy basic module an extra Ethernet WAN 10/100 MB port, which allows the Flexy to be adapted even more to your specific needs.