It turns the watch when your wrist is not
So the mainspring stays under tension and the watch is running, dated and roughly on time when you pick it up. It does not service a watch and it will not repair one.
You choose the turns per day
Every movement has a number it wants, most between 650 and 800 a day. On the walnut and Harcourt ranges, each rotor from the two-watch up has its own dial for 650, 750, 850, 1,000 or 1,900 turns a day and runs clockwise, anticlockwise or alternating. The Belgrave sets 650 to 1,950 per rotor from its touch panel. The Whitmore, Hadley and Marlow run four fixed programmes on one dial instead.
It runs from a USB socket you already own
A USB cable is in the box of every walnut, PU-leather and Marlow winder. Any phone charger or power bank drives it, so there is no region-specific plug and nothing to buy. The Belgrave cabinets are the exception: their mains adapter is in the box.










