Its about £21.98 for non prime, still good price.
With high quality tracking and easier scrolling, the Logitech M705 mouse is essential for both home and office use. The Logitech Universal Wireless Receiver allows you to manage all of your wireless devices from a single USB port, saving you space. Whether you are left or right handed, you don't have to worry about comfort. The mouse features an ergonomic design that is comfortable and easy to use, allowing you to work at your computer without pain or discomfort.
Logitech Unifying receiver
2x AA batteries