What is "kalx"

KALX (90.7 FM) is an FM radio station that broadcasts from the University of California, Berkeley in Berkeley, California. KALX, a community and student-run radio station licensed to the University of California, Berkeley, broadcasts in stereo with 500 watts of power. The station employs three full-time paid staff members, but is largely run by its nearly 300 volunteers, including Berkeley students and other members of the local community.