Main Features‎:‎New hand type operation‎,‎ release your wrist and gallop flyScientific ergonomic design‎,‎ stretch the human body meridian at the greatest degreeComfortable for alleviate wrist fatigue‎,‎ to prevent the mouse handHigh resolution up to 1200DPI‎,‎ accurate optical tracking Model‎:‎ W20 Type‎:‎ Mouse Features‎:‎ Rechargeable‎,‎Novelty‎,‎Mini Color‎:‎ Black Resolution‎:‎ 1200DPI System support‎:‎ Windows XP‎,‎Windows 7‎,‎Mac OS‎,‎Windows 2000 Interface‎:‎ Wired Connection‎:‎ Wired Operating voltage‎:‎ DC 5V Operation Current‎:‎ 150mA Power Supply‎:‎ USB Port Cable Length ‎(‎m‎)‎‎:‎ 1.5 m Package weight‎:‎ 0.201 kg Product size ‎(‎L x W x H‎)‎‎:‎ 10.5 x 7.5 x 5 cm / 4.1 x 3.0 x 2.0 inches Package size ‎(‎L x W x H‎)‎‎:‎ 12.8 x 9 x 7.5 cm Package Contents‎:‎ 1 x Wired Mouse