The Logitech M240 Silent is a compact Bluetooth mouse in Rose that keeps shared offices, libraries and late-night work sessions quiet. Logitech's SilentTouch technology cuts click noise by around 90 percent compared with the M185, while the left, right and middle clicks still feel positive. It pairs directly over Bluetooth Low Energy, so no dongle or USB port is needed, and it works with Windows, macOS, Chrome OS, Linux and Android at up to 10 metres. If you prefer a receiver it is also compatible with a Logi Bolt USB receiver, sold separately. Smooth optical tracking runs at 1000 DPI by default and can be set between 400 and 4000 DPI in Logi Options+ on Windows and macOS. The contoured, ambidextrous shape suits either hand, and a single pre-installed AA battery is rated for up to 18 months thanks to auto-sleep and an on/off switch. In the box: the mouse, one AA battery and user documentation. After comparing online prices, www.marvel.co.za should be the cheapest on this product.