Product Features *5 Adjustable DPI With 2 DPI buttons, it is easier for you to switch among 5 DPI 800/1200/1600/2000/2400 and flashing light will indicate you which DPI you are. Two polling rate: 125Hz and 250Hz. This wireless gaming mouse helps you to control the speed and sensitivity of mouse more freely. *Comfort & Precision At Your Fingertips The Redragon wireless gaming mouse is an essential computer accessory for die-hard gamers! You will be amazed by the unmatched comfort, lethal accuracy and killer precision of our durable, desktop and laptop pro gaming mouse! You can enjoy a wonderful clicking experience without disturbing others. It is an optimal choice in the office, library, dormitory or wherever you like. *Advanced 2.4Ghz Wireless Technology Discover the most responsive and comfortable Redragon Pro Wireless Gaming Mouse. The 2.4Ghz wireless enables working distance up to 10 meters or approx. 30ft with a little-to-no delay or signal drops. No any driver is required, just plug and play. *Long Life Span & Power Saving It has passed 10 million times keystroke test to guarantee extra durability. This wireless mouse will be in sleep mode in 8 minutes of inactivity and waken up quickly by pressing any button. Powered by 1*AA battery not included and easy to be replaced. *Strong Compatibility Works for Windows 7/8/10/XP/Vista/ME/2000/Mac10.x, etc. For Mac OS, the sided buttons are not available. Ideal for work or entertainment in home and office. NOTE: 1. The Back and Forward Buttons are not available for Mac OS because the system itself is a closed one, not open to the public, but the other function can be used normally. 2. No any software is required. Basic Parameters Connectivity Technology: 2.4Ghz Recommended Uses For Product: Office, Gaming Compatible Devices: Laptop, Personal Computer Model Name: M690-1 Package list 1 X Wireless Mouse Battery is not included 1 X USB Receiver 1 X User Manual After Sales Policy We will provide a replacement or repair service in the following cases: 1. Send the wrong product. 2. Products have quality problems. 3. You receive a fake one. 4. Products cover damage due to user behavior/ accident is NOT COVERED.