Etekcity 5R2 Mini Ultra Nano USB Wireless WiFi LAN Network Adapter 150 Mbps 2.4 GHz RTL 8188 Chipset Windows Linux MAC Smallest wireless adapter, built in USB, compact and portable, Plug and Play. Speedy wireless transmission at up to 150Mbps. Advanced Security Types: WEP 64/128, WPA/WPA2, WPA PSK/WPA2-PSK 2.4 GHz frequency, 802.11 b/g/n standards. Transmission distance: Indoor 100m/Outdoor 300m(depending on environment) Operating Temperature:040, Storage Temperature: -4070. Operating Humidity: 10%90%RH, Noncondensing:5%90%RH. System Windows XP/Vista/7/8,Linux,and MAC