The Zebra RS5100 20-Slot Charger is a purpose-built charging dock for Zebra's RS5100 wearable ring scanner, a compact barcode scanner worn on a finger or glove for hands-free scanning in warehouse picking and fulfilment operations. This particular unit charges up to 20 ring scanners at once, letting a warehouse rotate a large fleet of devices through a single overnight or shift-break charging station rather than plugging each one in individually. It requires a separate power supply (Zebra's PWR-BGA12V108W0WW) and DC line cord to actually power it, which aren't included per the listing — worth adding to the order if not already on hand, since the charger dock alone won't function without them.