Linksys USB VPN & Firewall Adapter, 0 - 40 °C, -20 - 70 °C, 10 - 85%, 5 - 90%, 120 x 15 x 64 mm, 70 g Linksys USB VPN & Firewall Adapter. Dimensions (WxDxH): 120 x 15 x 64 mm, Weight: 70 g. Minimum RAM: 64 MB. Maximum data transfer rate: 100 Mbit/s