A4-TECH A4TMYS46037 Mouse A4TECH V-TRACK 80036400 Product Description: A4Tech G3-200N - mouse - 2.4 GHz - black, blue Device Type: Mouse Connectivity Technology: Wireless - 2.4 GHz Colour: Black, blue Dimensions (WxDxH): 6.1 cm x 10.7 cm x 3.9 cm Wireless Receiver: Nano USB wireless receiver Movement Detection Technology: Optical Buttons Qty: 3 Movement Resolution: 1200 dpi Performance: Report rate: 125 Hz Features: Scrolling wheel, 4-Level Auto-power-Saving Battery: AA type OS Required: Microsoft Windows XP / Vista / 7 / 8 / 8.1 / 10