2pcs Wired Mouse:1pcs Silver & 1pcs Blue Small size, easy to carry, perfect for travel, kids friendly as well. when pulled apart.Retractable cord enables it to be able to be taken wherever desired for use on the computer whether at home, at work or anywhere else. 3D Technology High-resolution optical tracking for precise mouse movement. Plug and Play No drivers or programs required. Just plug and play.The cord length adjusts and winds/unwinds without tangling or getting stuck like some other wired mouse. Wide Compatibility All Windows 98 / ME / NT / 2000 / XP / Vista / Win 7 / Linux or Mac OS Product Name: USB wired mouse Resolution: 1200DPI Type of connection: USB interface Operating voltage and current: DC5 +/- 5% less than or equal to 100MA Flip wheel life: 1 million times Switch life: 5 million times Key Specifications: 60 +/- 5gf Key operation: 80 +/- 20gf Cursor positioning method: photoelectric Operating system: Windows 98, 2000, XP, Vista version and so on colour:Silver & Blue Material:ABS size:76mm x 40mm x 24mm Cable length: about 80 cm / 31.50 in (stretchable) Package Contents: 2 x Wired Mouse Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.