Shimano HB-NX10 is a high-powered hub dynamo that generates electricity when the bicycle is moving. It can power front and rear lights, and it has a built-in voltage regulator to protect the bulbs from damage. The HB-NX10 is easy to install and use, and it's a great way to improve your visibility and safety when riding at night.

Here are some of the key features and benefits of the HB-NX10:

• High power output: The HB-NX10 can generate up to 6 volts of electricity, which is enough to power even the brightest lights.
• Voltage regulation: The HB-NX10 has a built-in voltage regulator that protects the bulbs from damage. This means you can use brighter bulbs without worrying about them burning out.