The light comes with an intelligent brake sensor for urban riding and auto on-off function for convenient operation. There are also 5 other modes, 3 constant and 2 flashing modes, for various riding environments. It is easy to use with the USB-C charging port and compatible with round and aero seatposts.Daytime and night visibleWarning flashing mode with eye-catching flashing pattern and max 350 led lumens to maximize your daytime visibility6 different modes for various daytime and night riding environmentsBuilt-in motion sensor for brake detection and auto on-off functionWhen activated, the light will switch to 100 lumens output for 2s to increase your visibility when detecting braking. The light will switch off automatically after staying still for 2 minutes and turn on with vibrationInternal side stripes for brighter side visibilityProviding brighter side visibility with the internal stripes reflecting the lightUSB-C charging portReversible connector to charge the light easily and n