Portable mice have always required some degree of compromise. The models comfortable enough for an entire day at a desk usually create an awkward lump inside a laptop bag, while those small enough to disappear into a travel pouch can feel cramped or overly basic.
The Logitech Mobi Fold attempts to find a place somewhere between the two. This portable Bluetooth mouse folds nearly in half when it is time to travel, then opens into a curved shape that feels considerably more like a conventional mouse.
