OLIGHT SEEMEE 30 C Bike Lights Lumens 800m Viewable Range Cycling Back Light, USB Rechargeable and IPX6 Waterproof Bicycle Taillights for Safety

[Design For Safety] Efficient COB LEDs provides 30 lumens maximum output with wide-angle beam to ensure you're seen from 800 meters for safety [Convenient USB-C Charging] The USB-C rechargeable battery provides up to 90 hours runtime. Also, the built-in battery indicator will be breathing to remind you that it is charging [Efficient Energy Consuming] There is a low battery mode to ensure the durability and energy consuming; With the ambient light sensor, SEEMEE 30 C will atuomatically adjust the light mode and output [Easy Mounting] A tool-less removable rubber ring for seat posts 22-32mm+ diameter, compatible with standard and aero seat posts [Applications] Suitable for urban riding and daily commuting daily commuting or urban riding, whether it's night time or daytime