The road measures 15.31 miles long and would take a car obeying speed limits 26 minutes to travel its length.
The B4392 is a B Road and is located in the Zone 4 Highways Region.
This is a true long-distance route, journeying through numerous towns like Cyfronydd, Maes Mawr, Moelygarth, Guilsfield, Pool Quay, and Arddleen.
The road is located entirely within Powys.