Supernova The Plug III

The Plug III sits where your stem cap is. It contains a USB charging port so you can charge your GPS, smartphone, USB lights, or external battery via your dynamo hub. Best use: let it charge your external battery, then charge your devices via the battery.

· Transforms dynamo AC to exact USB spec. DC from 12 km/h. That means you need to be riding 12 km/h before charging starts (with 700c wheels; charges at slower speed if your wheels are smaller)
· Now further improved with no upper charge speed limit: you won't burn anything out just because you're flying down a mountain at high speed.
· Replaces headset top cap
· Does not include Steerer Tube Expander Plug