City bike helmet with integrated light. Integrated front and rear lights with a 10-hour battery life, rechargeable via USB Type C. Suitable for head sizes from 54 cm to 61 cm. Turn signal function to indicate direction changes (includes remote control for handlebar mounting). Lightweight design - 370 g in the smallest size. Cob LED light: compact form factor and high brightness. Integrated turn signal. Two red/orange Cob LEDs with flashing function are mounted on the back. With the included remote control, you can clearly signal all direction changes to other road users. The remote can be mounted on the handlebar, and up to two remotes can be paired with your Lumos Ultra. Remotes from other Lumos models are also compatible. Apple Watch owners can use their watch as a remote control as well. Companion app. To get the most out of your helmet, you can download the Lumos Companion App on your Android smartphone or Apple iPhone. Through the app, you can set your own blinking patterns and check the exact battery level of the helmet. The app is not mandatory for using the helmet.