Photo 1 of eirix Wireless Trackball Mouse: Ergonomic Mouse Easy Thumb Control Precise & Smooth Tracking with 5 Levels Adjustable DPI, BT or USB Connection Compatible for PC, Laptop, Windows and MAC OS 2.4G+BT1+BT2(BLACK)

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Photo 1 of eirix Wireless Trackball Mouse: Ergonomic Mouse Easy Thumb Control Precise & Smooth Tracking with 5 Levels Adjustable DPI, BT or USB Connection Compatible for PC, Laptop, Windows and MAC OS 2.4G+BT1+BT2(BLACK)Photo 2 of eirix Wireless Trackball Mouse: Ergonomic Mouse Easy Thumb Control Precise & Smooth Tracking with 5 Levels Adjustable DPI, BT or USB Connection Compatible for PC, Laptop, Windows and MAC OS 2.4G+BT1+BT2(BLACK)