It is a flight timer and AM radio reciever. It lets you listen to both types of music.... Country and Western, inane radio commentators, bad 1960's rock and roll .......oh and it will point towards a radio station on the ground plus or minus about 5 degs if there are no CBs near, the aircraft is not banking, The station is directly ahead , you are not near a coast, etc etc etc.
This post prompted me to look through my log book. As near as I can figure the last time I had to do a for real NDB approach in IMC conditions without at least supplementary (and superbly accurate) GPS track guidance was 1995
