This article discusses WiFi adapters for the E-Series 2 POS Systems

E-Series 2 POS Systems are equipped with Ethernet connections and do not have an integrated WiFi card. Some customers may wish to add a USB WiFi adapter to these systems to have wireless internet connectivity. Below is a suggested USB WiFi adapter that has been tested and worked on the E-Series 2 POS Systems.

EDUP AC600M USB WiFi Adapter for PC, Wireless USB Network Adapters Dual Band 2.4G/5.8Ghz Wi-Fi Dongle with Antenna. See manufacturer's product specification page here. 

Chipset tested on E-Series 2 with Windows 10 IoT Ent2019, LTSC Entry: RTL8811CU