CIDR-FM (93.9 MHz, 93.9 Virgin Radio) is a commercial Canadian radio station in Windsor, Ontario, targeting the Detroit–Windsor radio market. It is owned and operated by Bell Media and airs a Top 40/CHR format. The studios and offices are located on Ouellette Avenue in Windsor. CIDR has an average effective radiated power (ERP) of 79,600 watts, with a peak power of 100,000 watts. The transmitter is off Howard Drive in Amherstburg.