I buy these a lot and they work great. Do not buy if you are unfamiliar with routerOS or willing to learn and post on the mikrotik forums. They are not for novice users.
MikroTik Dual-Concurrent Access Point: hAP ac Lite RB952Ui-5ac2nD-US
79 Review
MikroTik RBcAPGi-5acD2nD-US: High-performance Dual-Band 802.11ac Access Point
35 Review
Ubiquiti NanoStation locoM2 2.4GHz airMax 8dBi CPE - Indoor/Outdoor High Performance Wireless Device
30 Review
Wi-Fi router Keenetic Hero 4G KN-2310, white
76 Review
UGREEN USB 3.0 Ethernet Adapter Hub with RJ45: Fast Gigabit Ethernet Converter, 3 Ports USB 3.0 Hub Compatible for MacBook, iMac, Surface Pro, Chromebook, Laptop, PC
11 Review
π StarTech.com NETRS2321P: 1-Port RS232 to Ethernet IP Converter, Serial over IP Device Server - Black
5 Review
π USR-TCP232-410s: RS232/RS485 Serial to Ethernet Adapter/IP Device Server with DHCP/DNS Support
4 Review
HB-UMLS Sabrent USB 2.0 Hub with 4 Ports and LED Power Switches for Each Port
12 Review