Super-compact design that sits right in the palm of your hand means that this little marvel is ready to go just about anywhere with you. Totally wireless, it comes with a discreet nano receiver that is so small it can be left in a USB port permanently, or even stored in the M187 itself when on the move. Key benefits: The 2.5GHz frequency means it will work at a distance of up to 10 metres with minimal interference. Plug and play setup lets you get to work right away. Quality construction and a 3 year guarantee means precision that you can rely on.