Sitecom Wireless PC Lock. Weight: 16.5 g, Dimensions (WxDxH): 18 x 70 x 8 mm. Package dimensions (WxDxH): 150 x 35 x 225 mm, Package weight: 0.2 kg. Minimum system requirements: 1 x USB, Compatible operating systems: Windows 98SE/ME/2000/XP