SMC2536W-AG Universal High Power Wireless Adapter: It is a versatile high-performance CardBus adapter designed for anyone who needs to connect to a wireless network at home, at school, at the office, or in public hotspots. Its tri-mode, dual-band operation lets notebook PCs connect wirelessly to any of three available wireless networks — 802.11a, 802.11b, and 802.11g that operate in two discrete, non-interfering frequency bands: 2.4 GHz and 5 GHz.