27.40 CHF
TP-Link TL-WR802N
TP-Link TL-WR802N
I can now answer the question myself, as I simply ordered such a small magic box - and was rewarded: Yes - it can also be used merely as a router for a local wifi.
The device really supports all conceivable configurations:
Router (i.e. with private wifi for all connected devices).
access point
Client Mode
Repeater Mode
WISP mode (simultaneous wireless ISP access and sharing)