Caseflex LED Optical Wireless Bluetooth Mouse [5 Button] With Ergonomic Air Glide Design & Adjustable DPI [800 / 1000 / 1600] Premium optical laser mouse connects directly to your computer & Bluetooth devices without needing an extra receiver. Designed to suit all your needs from office work to gaming - Features adjustable settings from 800 - 1600DPI letting you choose the cursor speed best for you. The durable yet compact and portable size means you can take this mouse out with your laptop. Keep your PC USB ports empty and your desktop free of cables thanks to truly cordless built in technology. Includes battery life enhancing features allowing you to use the same battery for longer.