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 ample 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 ample freedom of movement without the hassle of tangled cables: This input device establishes a wireless direct connection to your Bluetooth-enabled computer. Unlike other wireless devices, it does not require a USB receiver, keeping your USB ports available for other peripherals. Logi Bolt receiver. This mouse supports Logitech 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. This keeps your computer's USB ports free 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.