Daffodil WMS316L Wireless Optical Mouse / Wireless Mouse - Computer mouse with 3 buttons, wheel and DPI (PPP) Adjustable (Max: 1600) - For Laptop / Notebook / Desktop - Compatible with Microsoft Windows (7 / XP / Vista) and Apple Mac (OS X +) - Powered by 2 AAA batteries (included) (Accessory)
Beautiful color. Falls well in hand (well mine worker more than pianist). Battery seems to last a long time (especially with automatic disconnection). The stop switch is used only in the case if she presses a button.