Linksys Wireless-B Media Adapter. Antenna type: external(included), Indoor range: 100 m. Number of users: 256 user(s), Networking features: LAN,VLAN,VPN. Data link protocols: IEEE 802.3, IEEE 802.3u, and IEEE 802.11b. Security algorithms supported: WEP Encryption 64/128 bit. Dimensions (WxDxH): 160 x 190 x 50 mm, Weight: 0.37 kg