Overview: Standards: IEEE802.11n, IEEE802.11g (draft), IEEE802.11b Antenna: 2d Bi antenna Pocket design, global minimum, light weight Easy to carry, convenient to use, especially for traveling out business The detachable antenna enables you to change a higher gain one for batter wireless signal transmission Effective working distance: 200 meters farthest indoor & 830 meters farthest outdoor (varies due to environment) Suitable for WIN2000, WINXP, Vista, WIN7, Linux, MACSpecification: Weight Approx: 45g Size Approx: 4.3 x 1.5 x 0.5 cm