I've experimented with this and used it as both a wireless client and an access point. It uses Mikrotik's default RouterOS and has no limitations. The price was only $19 when I bought it and I will buy it again at this price. It's currently more expensive than the RB941 with the same hardware but 4 ports instead of 3 so I wouldn't recommend it now.
MikroTik RB941-2nD RouterBoard hAP Lite: Affordable 2.4GHz Home Access Point
71 Review
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
Mikrotik RouterBOARD 951Ui-2HnD RB951Ui-2HnD: High-Power 2.4Ghz Wireless AP with 5x10/100 Ports and OSL4
73 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 CERRXIAN RS232 to Ethernet Serial Device Server - TCP/IP Converter with 1Port DB9 RS232 Serial to Ethernet Connectivity
3 Review
π USR-TCP232-410s: RS232/RS485 Serial to Ethernet Adapter/IP Device Server with DHCP/DNS Support
4 Review
π uni USB C Hub with Ethernet Adapter, 4K HDMI, Gigabit Ethernet, and 3 USB 3.0 Ports for MacBook Pro, iPad Pro, XPS
11 Review