Built for the most discerning user, The Authentic R.A.T. 8+ Optical Gaming Mouse offers the ultimate in performance and comfort. Multi-button functionality lets you take control of your gaming experience. An adjustable DPI button lets you increase or decrease the DPI instantaneously, up to 16000. The precision button instantly increases or decreases the sensitivity, perfect for in-game sniping. With F.L.U.X. desktop software*, you can create unlimited profiles for your mouse while storing the top 4 on the mouse itself, keeping your loadouts ready to go. An independent side scroll wheel is fully customizable within the included software, giving you even more control. The R.A.T. 8+, using the adjustable weight system allows you to customize the mouse weight to fit your needs. Create the perfect grip with the adjustable palm rest or swap it out for even more comfort and control. The adjustable thumb rest moves along two axes and the optional pinky rest lets you create the ultimate ergonomic grip. And with industry-leading OMRON switches, the R.A.T. 8+ can keep up with the even most furious clicker, with a 50 million click lifetime.

MK540 Advanced is an instantly familiar wireless keyboard and mouse combo built for precision, comfort and reliability. The full-size keyboard features a familiar key shape, size, and feeling - optimized for precision and noise reduction.

The palmrest and adjustable tilt legs keep you comfortable for long stretches and the contoured mouse is designed to fit perfectly into either palm. Plug and play your keyboard and mouse with one tiny USB receiver with Logitech Unifying™ technology. You'll get a reliable - and encrypted - wireless connection up to 10 meters away with virtually no delays or dropouts.

Your keyboard won't require new batteries for 36 months and your mouse stays powered for 18 months.

Meet ERGO M575-a wireless trackball with incredibly easy thumb control. This is the newest addition to the Logitech Ergo series that promotes increased comfort, lower muscle strain, and improved, more natural posture.

Forget about sliding around a mouse or moving your arm to move the cursor. The ergonomic sculpted shape of ERGO M575 minimizes movement and maximizes comfort while keeping your hand and arm relaxed.

With two ways to connect-via Bluetooth® Low Energy or the USB receiver-the trackball provides you a powerful, stable signal with a 33 ft (10 m) range.

No need to move your trackball, so it's perfect for tight workspaces and busy desks. A single AA battery lasts up to 24 months with the included Unifying USB receiver and up to 20 months with Bluetooth® Low Energy.

Optical gaming mouse offers style, comfortable feel and enhanced performance that's also light and super-strong. Titanium screw fittings and a carbon fiber thumb-plate further reinforce the mouse. Super-hydrophobic coatings help keep your hands dry in the heat of battle. Magnesium alloy on the primary buttons provide a more reliable actuation. Ultra-reliable OMRON switches with an industry-leading life of 50 million clicks ensure that even the highest actions per minute. Dynamic design uses precision engineering and state-of-the-art manufacturing techniques to make different parts of the product adjustable to enhance your playing style. Swappable scroll wheels, thumb rests, pinkie rests and palms rests offer up to 2,700 different physical configurations. You also have the ability to precisely calibrate tension and speed, and swap the actual wheel depending on how you want the game to be played.