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 OSProduct Parameters:Product Name: USB wired mouseResolution: 1200DPIType of connection: USB interfaceOperating voltage and current: DC5 +/- 5% less than or equal to 100MAFlip wheel life: 1 million timesSwitch life: 5 million timesKey Specifications: 60 +/- 5gfKey operation: 80 +/- 20gfCursor positioning method: photoelectricOperating system: Windows 98, 2000, XP, Vista version and so oncolour:BlackMaterial:ABSsize:76mm*40mm*24mmCable length: about 80 cm / 31.50 in (stretchable)Package Contents:2 *Wired MouseOnly 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.