Logitech Wireless Mouse Signature M650, 4000 dpi, optical, white. SmartWheel scrolling. Seamless wireless connectivity. Quiet clicking. Customizable side buttons for enhanced comfort and productivity. USB receiver for wireless convenience. Enjoy plenty of freedom of movement without the hassle of tangled cables: USB wireless input devices connect wirelessly to the receiver that you plug into an available USB port. Wireless convenience: Bluetooth connection. Enjoy plenty of freedom of movement without the hassle of tangled cables: This input device establishes a direct wireless connection to your Bluetooth-enabled computer. Unlike other wireless devices, it does not require a USB receiver, keeping your USB ports free for other peripherals. Logi Bolt receiver. This mouse supports Logitech's Logi Bolt technology. This means you can pair not only the mouse but also up to six Logi Bolt-compatible devices with the same receiver, keeping your computer's USB ports available for other uses. Another advantage is that you can easily connect the input devices with a new Logi Bolt receiver if you lose your old one.