Product Parameters: 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: times Switch life: 5 million times Key Specifications: 60 +/- 5gf Key operation: 80 +/- 20gf Cursor positioning method: photoelectric : 98, 2000, XP, Vista version and so on colour:Red/Silver Material:ABS size:76mm*40mm*24mm Cable length: about 80 cm / 31.50 in (stretchable) Package Contents: 2 *Wired Mouse Only the above package content, other products are not included. Note: Light 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. 2 *Wired Mouse: 1* Red & 1* Silver Wide Compatibility All 98 / ME / NT / 2000 / XP / Vista / Win 7 / Linux or OS 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 stuck like some other wired mouse. Small size, easy to carry, perfect for travel, kids friendly as well. when pulled apart.Retractable cord enables it to be to be taken wherever desired for use on the computer whether , at work or anywhere else.