USB 2.0 Wireless WiFi Lan Card for Dell OptiPlex 790 (Mini Tower) With Internal Antenna Dimension: 35 x 26 x 5 mm (approx) Net weight: 20g Package Content: 1 X 150Mbps USB Wireless Lan Card; 1 x CD Driver Complies with Standards: IEEE 802.11g, IEEE 802.11b,IEEE 802.11n