The femto rear light is a distinctive copper coloured red led rear bicycle light that can be quickly attached to the frame or seatpost with a simple rubber band and clip. The femto rear light is a distinctive copper coloured red led rear bicycle light that can be quickly attached to the frame or seatpost with a simple rubber band and clip that won't damage painted or polished surfaces and is easily removed to prevent theftmdashsmall enough to stow in your pocket and bright enough to ensure you remain visible to other road users after dark. Choose between constant illumination or four different flashing modes. Anodised body with laser etched brooks logo. Includes 2 x cr2032 batteries. Features copper coloured white led front bicycle light constant illumination or four different flashing modes 7 lumens 2 cr2032 batteries included