Maximise Your Visibility With a maximum of 500 LED lumens and improved eye-catching warning flashing mode, TR500 maximises the ride's daytime visibility to a new level. The light comes with an intelligent brake sensor for urban riding and auto-on-off function for a convenient operation. There are also 5 other modes, 3 constant and 2 flashing for various riding environments. It is easy to use with the USB-C charging port and compatible with round and aero seatposts. Daytime & Night Visible: Warning flashing mode with eye-catching flashing pattern and a maximum of 500 LED lumens to maximise your daytime visibility. Built-in Motion Sensor for Brake Detection & Auto On-Off Function: When activated, the light will switch to 200 lumens output for 2 seconds to increase your visibility when detecting braking. The light will switch off automatically after staying still for 2 minutes and turn on with vibration. Internal Side Strips for Brighter Side Visibility: Providing brighter side visibility with the internal strips, reflecting the light. USB-C Charging Port: Reversible connector to charge the light easily and with no need to flip around looking for the correct orientation. Compatible With Round & Aero Seatposts Two pads and rubber bands in different sizes and length for various sizes of round and aero seatpost; solid and lightweight anodized aluminium body. Technical Specifications LED: 3 x red LEDs Battery: 1600mAh/3.7V rechargeable Li-Ion battery Dimensions: 41 x 33 x 62mm Weight: 77g Seven Day Cyclist Review: https://prf.hn/click/camref:1100l3S37e/creativeref:1011l140395/destination:https%3A%2F%2Fwww.sevendaycyclist.com%2Fravemen-tr500-rear-light