WXAJ (99.7 FM) is a commercial radio station, licensed to Hillsboro, Illinois, and serving the Springfield metropolitan area.

The radio studios and offices are on South 4th Street in Southern View, Illinois, using a Springfield address.

WXAJ has an effective radiated power (ERP) of 50,000 watts, the current maximum for most FM stations in Illinois.

From 2002 to March 5, 2017, the station aired a Contemporary hit radio (Top 40/CHR) format as "99.7 Kiss FM".

On March 6, 2017, at 6 a.m, the station shifted to a Hot Adult Contemporary format, and re-adopted the earlier "99-7 The Mix" moniker.