1).Exclusive use for common technical support 2).Build-in 2.5\" high quality hard disk 3).USB 2.0 compliant 4).Windows 98/Me/2000/XP, Mac compatible MEAS/CTN:71cm x 45cm x 64cm QTY/CTN:80pcs Unit packing(WxLxH):13.2cm x 18.7cm x 3.8cm G.W/Unit pcs:250g GW/CTN: 20kg gift box