The dock works with all Apple Watches released to date. It can plug in directly, but there's also a short male-to-female cable in the box if space is tight near the USB-C port. The charger is more expensive than Apple's own options (including its native USB-C cables) at $45, but it might be easy to justify the outlay if you'd like a travel charger that occupies very little space and works with many of the devices you already own.