In 1963, Smith took his act to the border when the Inter-American Radio Advertising's Ramon Bosquez hired him and sent him to the studio and transmitter site of XERF-AM at Ciudad Acuña in Mexico, a station across the U.S.-Mexico border from Del Rio, Texas whose high-powered border blaster signal could be picked up across much of the United States. In an interview with writer Tom Miller, Smith described the reach of the XERF signal: "We had the most powerful signal in North America. Birds dropped dead when they flew too close to the tower. A car driving from New York to L.A. would never lose the station." Most of the border stations broadcast at 250,000 watts, five times the U.S. limit, meaning that their signals were picked up all over North America, and at night as far away as Europe and the Soviet Union. It was at XERF that Smith developed his signature style (with phrases like "Who's this on the Wolfman telephone?") and widespread fame. The border stations made money by renting time to Pentecostal preachers and psychics, and by taking 50 percent of the profit from anything sold by mail order. The Wolfman did pitches for dog food, weight-loss pills, weight-gain pills, rose bushes, and baby chicks. There was even a pill called Florex, which was supposed to enhance one's sex drive. "Some zing for your ling nuts", the Wolfman would say.