Features: Super-small size compact design that fits into your computer's USB port with minimal protrusion making it for use when traveling or in a crowded workspace Provides an excellent solution for performing everyday activities such as transferring files, browsing the Internet, and downloading music. Complies with wireless 802.11n standards Data rate up to 150Mbps Supports 64/128 bit , WPA encryption Transfer Method: Direct Sequence Spread Spectrum (DSSS) Frequency Band: 2.4~2.4835GHz Effective Working Distance: 100 meters farthest indoor and 150 meters farthest outdoor (varies due to the environment) Support System with Vista / XP / 2000 / 7 / with / Linux Dimensions: 0.71 inch x 0.59 inch x 0.24 inch (18 mm x 15 mm x 6 mm) Net Weight: 0.28oz (8g) Colour: Black Material: ABS Package Including: 4 x Wifi Network Adapter Please note that you may have to download the driver manually and install it for time use Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.