【Less Muscle Strain Ergonomics】Advanced ergonomic computer mouse provides total comfort with 30° ergonomic handshake angel, contoured grips and premium matte finish.6 ʙᴜᴛᴛᴏɴs ᴅᴇsɪɢɴ - new added forward and backward buttons on the side which browses the web, and processs files more efficiently and conveniently. | 【Faster Wireless Transmission Speed】 33FT/10M 2.4G wireless connection reduces all the interference and delays. Just plug the USB receiver into pc or laptop and your D-09 works instantly.No delay ,no interference.✦Mini usb receiver is stored back of the mouse,beside the battery✦. | 【3X Less Hand Movement】800/1200/1600/2000/2400 DPI high precision sensor reduces muscle fatigue and boost your workflow. Cursor moves 3X faster than basic computer wireless mouse. | 【1 AA Battery, 2X Longer】Only 1 AA battery lasts up to 18 months. It enters sleep mode after you leave for 8 minutes ,only click any button to recall. D-09 wireless computer mouse saves time and money by practically reducing the need to change batteries. | 【Highly-Intergraded Body】Durable 50 Million clicks. Portable for travel use. Work with Windows laptop/MacBook/Chromebook/PC -Any Device with USB Ports.✦Side buttons are unavailable for Mac OS✦.Fast & easy 36 ᴍᴏɴᴛʜs ʀᴇᴘʟᴀᴄᴇᴍᴇɴᴛ ᴏʀ ʀᴇғᴜɴᴅ.PLZ do not hesitate to let HOTWEEMS know .