"Powerful and lightweight, the RFR Power Light 800 delivers up to 800 lumens. The durable CNC-machined aluminium case protects the interior against water ingress (IP65 rating). Stay in full control thanks to the battery indicator which reliably lets you know when the lithium-ion battery is running low. Recharging is practical and easy via USB. Includes helmet mount, headlamp strap and battery pack., Lights listed under "Outdoor" may not be affixed to bikes/vehicles or used on public roads in Germany.