What is the maximum speed of the mikrotik groove a-52hpn?

Question

Computer networks

Hello.
There is internet over twisted pair 10-15 Mbps if directly in the computer. I bought mikrotik groove a-52hpn. The maximum wifi speed is no more than 7Mbps (rarely). On average 3-5 Mbps. Set up WIFI 2G-b/g/n. Channel width 20 MHz. Transmitter power default.
When I set it to 17 dBm, it reaches 7 Mbps. But I bought it so that there was a signal around the yard. Only one laptop is connected (I). Can anyone give advice on how to speed up. Frequency range clear.

Answer 1

First, set the channel width to 40 Mhz. and 2G mode - N only
in the second, use 5Ghz if the client supports