[Mini Size ]Small size, easy to carry, perfect for travel, kids friendly as well. [Retractable Design]The compact size is 1.6 inch,but it is 28-inch line length 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. [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. [Wide Compatibility]All 98 / ME / NT / 2000 / XP / Vista / Win 7 / Linux or OS Product Parameters: 1. Product Name: USB wired mouse 2. Cable length: about 80 cm / 31.50 inch (stretchable) 3. Resolution: 1200DPI 4. Type of connection: USB interface 5. Operating voltage and current: DC5 ± 5% Less than or equal to 100MA 6. Flip wheel life: times 7. Switch life: 5 million times 8. Key Specifications: 60 ± 5gf 9. Key operation: 80 ± 20gf 10. Cursor positioning method: photoelectric 11. : 98, 2000, XP, Vista version and so on Colour: Material: ABS Size: 76mm x 40mm x 24mm Package Contents: 3 x Wired Mouse Only the above package content, other products are not included. Note: Light reflection 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.