... Scrolling Optical Mouse 1. USB Port. 2. Touching scrolling. 3. Retractable line. 4. Black color. PC Mouse with Touch Scrolling DESCRIPTION * PC mouse ... Optical sensor * Retractable usb line* Dimensions: 8,1 x 4,8 x 1,65 cm * Colours: white, black, etc.SPECIFICATIONS2.4G wireless mouse ... 8KG4. MEAS:47.5*34*15CM wireless mouseIterm SCGJ-T5-2.4GTracking system optical Interface USB Key life 300,000,000 ...