Sigma calls its Ratino as the “World’s Smallest” laser mouse with retractable USB cable. It has an adjustable sensitivity of 1000dpi for normal office type use and lightning quick 2000dpi for gamers with an especially sensitive trigger finger. It measures 30 x 70 x 20mm and weighs 40g. It is available in four colors, white, black, red and blue. The price for Sigma’s Rotino laser mouce is $25.