Left-handed ergonomic pen mouse-Designed for left-handed people, promote healthy neutral "hand shake" wrist and arm positions, make movement smoother and reduce overall stress. It is recommended that RSI users and users of Repetitive Strain Injury workparticularly long hours on the computer. Fast charging technology - its stand-alone 450 mAh lithium battery can run for up to 30 days, can last for about 12 months in standby mode, and it takes only 1-2 hours to fully charge, so you don't need to charge as often as other wireless mice Or replacethe battery. Simple and easy to use-just "plug and play". No need for other software or firmware; support operating system: Windows 2000/2003/ Win7 / 8 /10/ Vista/ ME/ Mac OS/ Linux The built-in color lighting design is more beautiful than the previous generation products. Especially suitable for you who work at night. It emits comfortable lights and makes you feel happy.