The speeds available via WiFi will vary depending on the local environment as well as the capabilities of the devices at both ends. So if the WiFi adapter or network card inside the computer is not capable of communicating at more than 30 Mbps, then this may be the primary limiting factor.
Below are some examples of the speeds that can be achieved using Wireless N vs Wireless AC.
- 802.11ac at one metre: 90MBps, 10 metres: 70MBps and at 20 metres behind two solid walls: 50MBps
- 802.11n at one metre: 30MBps, 10 metres: 20MBps and at 20 metres behind two solid walls: 5-10MBps
- Shelly