Key Details: Full size, comfortable grip with soft material by side The ergonomic design reduces fatigue in the thumb area Blue optical sensor, tracks on most surfaces Silent left and right button 2-way metal scroll wheel (up/down) with configurable scrolling speed On-the-fly DPI (three stages) and adjustable via software up to 4,000 DPI Connect with Bluetooth 5.0 and Swift Pair support Multi-device switch and connect with the bottom pairing button Rechargeable, 2 to 3 months use, less than 2 hours to fully charge Programmable side and top buttons for custom shortcuts One-year long-term warranty