The TR300 provides a larger viewing angle and max 300 LED lumens flashing modes, providing great visibility for daytime riding. Internal side reflecting stripes also enhance the side visibility and increase the rider’s safety. With 3 high lumen CREE XP-E2 red LEDs and a solid and lightweight anodized aluminum body, compatible with round and aero seatposts (adapter provided). The auto on-off mode offers convenient use while the intelligent memory circuit remembers the last used brightness level and mode when turned on again. Micro USB charging port, compatible with most phone chargers.