External usb hard drive wireless hard drive memory capacity 1 tb series buffalo ministation air 2 bus sata form factor 25 inch power supply via usb port network capable wireless lan standards ieee 80211b ieee 80211g ieee 80211n wireless lan encryptions wep wpa wpa2 battery life 12 h battery capacity 3 020 mah colour silver dimensions 140 x 84 x 18 mm weight 255 g