High Quality Content by WIKIPEDIA articles! XESMR-AM, also known as Radio Formula San Luis, is a radio station located in the city of San Luis Potosí, San Luis Potosí, Mexico. IT broadcasts in the 710 KHz band amplitude modulation with 30,000 watts of power. IT is now known as San Luis Radio Formula. TRansmit programming Radio Formula XERFR-AM 970 KHz from Mexico City. RAdio broadcasting is an audio (sound) broadcasting service, broadcast through the air as radio waves (a form of electromagnetic radiation) from a transmitter to a receiving antenna. STations can be linked in radio networks to broadcast common programming, either in syndication or simulcast or both. AUdio broadcasting also can be done via cable FM, local wire networks, satellite and the Internet.