Features: 1.Ergonomic Design: This ergonomic wireless mouse reduces muscle strain, wrist pain, fits your palm and keeps your hand and arm in a more comfortable position. 2.Convenient Button: This ergonomic wireless mouse is equipped with "next one" and "last one" button that are convenient for web surfing. 3.Power Saving Mode: This ergonomic wireless mouse will enter power saving mode after 8 minutes without using, pressing the left right button to evoke. 4.Easy to Use: This ergonomic wireless mouse is easy to use, just insert the USB receiver and you can start to use directly. 5.Ideal Gift: This ergonomic wireless mouse is an ideal and practical gift for game players and people who work in front of computer. specification:Item Type: Ergonomic Wireless Mouse Material: ABS Interface: USB2.0+ BT 5.0 DPI Speed: 1200DPI Battery: Inbuilt 400mAh Lithium Battery (Battery Included) PackageList:1 x Ergonomic Wireless Mouse 1 x USB Receiver 1 x Charging Cable 1 x User Manual