[Vertical type and comfortable touch] The vertical ergonomic design fits in your hand and keeps your wrist and arm in a natural shape. The rubber coated surface prevents the grip from slipping and provides a comfortable fit. Skin -friendly materials, light weight, comfortable touch. [Small and easy to carry] Designed for small hands, size: about 105 x 67 x 60 mm. Low height, only 60mm high. Other mice usually have a height of 75mm. It is designed smaller than most vertical mouse, so it is convenient for people with small hands. Even new users can quickly be used to it. [Wide Compatibility] The optical system improves tracking and achieves high reading performance. Simply plug and play, easy to use. Compatible with Windows 7/8/10/XP, Vista 7/8, Linux, Mac OS, etc. Perfect for desktops, laptops, PCs, Macbooks and other devices. [USB Rechargeable, Power Saving Mode] The built-in 400mAh rechargeable lithium battery is durable and the charging time is about 2-3 hours. It can be charged by using the micro USB cable. It will automatically enter sleep mode after a few minutes of inactivity, saving power and extending usage time. [Specifications] Low noise & power saving mode. Size: about 105 x 67 x 60mm (M size), weight: about 78g. The USB receiver is located on the bottom of the mouse. Charging cable length: about 27cm. 6 buttons: forward button, backward button, DPI button (800/1200/1600), scroll wheel, left click, right click.