Revision 9.2, antennas 5db. I took dir-300 a.1 as a replacement, which, when connected via L2TP, even over a cable gave out more than 6 Mbps. I felt the difference immediately both in speed and in communication range. It breaks through two reinforced concrete walls without problems (the speed drops by half), 4 reinforced concrete walls - at the limit. In general, a good device for the money, I recommend.
π StarTech.com NETRS2321P: 1-Port RS232 to Ethernet IP Converter, Serial over IP Device Server - Black
5 Review
π Juiced Systems Silver BizHUB USB-C Multiport Gigabit HDMI Hub with 3 USB 3.0 Ports, Gigabit Ethernet, 4K HDMI, SD/Micro SD, and USB-C Power Delivery
11 Review
π CERRXIAN RS232 to Ethernet Serial Device Server - TCP/IP Converter with 1Port DB9 RS232 Serial to Ethernet Connectivity
3 Review
HB-UMLS Sabrent USB 2.0 Hub with 4 Ports and LED Power Switches for Each Port
12 Review