MHz PCS frequencies. There are other aspects of wireless that relate to dual band: In Wi-Fi wireless networking, dual band is the capability to transmit on the 5 GHz band... of 802.11a and also the 2.4 GHz band used by 802.11b, 802.11g, and 802.11n. Unlike ordinary Wi-Fi equipment that only supports one signal band, dual-band gear contain two different types... of wireless radios that can support connections on both 2.4 GHz and 5 GHz links. Dual-band Wi-Fi is a feature of some wireless routers and network adapters. Some cellular phones also...