Knog PWR Lighthead is a light head that uses a circular beam to detect and illuminate even unpredictable obstacles from different angles. This modular head can also be used with small, medium and large PWR power banks.When Knog designs a light, optics are the most important consideration. Whether it's new LED shapes or beams, it strives to make every lumen work efficiently once you're on the bike. If you use PWR lighting for other types of cycling, this modular lighting system lets you expand your product offering without too much cost. Get brighter light for more brightness. Light output: 2000 Lumen Dimensions: 39 mm x 48 mm Ø Weight: 100 g Packaging: light head and USB cable COMPATIBILITY: The 2000 L light head is compatible with 3350 mAh, 5000 mAh and 10,000 mAh PWR power banks. PROGRAMMING MODES: Plug the light head into your computer, download the ModeMaker app, then customize the lighting modes to suit your needs. Light Beam: Light head with circular beam to illuminate unpredictable obstacles from different angles. Accessories.