I have an older one and a newer one.   TP-Link MR3040:  Pro's - small with self contained battery.  Con's - Long since discontinued, no firmware updates, 2.4 GHz only, have had mixed success with.  More fiddling to get it to work. TP-Link AC750 TL-WR902AC:  Pro's - 2.4 & 5 GHz bands, current model, good experience so far.  Con's - No internal battery but can be paired with an external battery and carried in a pocket or backpack. There is another potential benefit of