Super Bright: This visible bicycle LED rear light features total 7 different lighting modes. The blue, white, and red indicator lights flash alternately, which can prominently warn pedestrians and vehicles behind in the dark.Ambient Light Detection: The bike cycling safety accessories is equipped with a built-in light sensor, which will automatically turn off during the day and light up at night or when riding through dark environments.IPX7 Waterproof: The ultra bright safety warning cycling light adopts sealing design and the waterproof index reaches level 7. With good waterproof performance, it is not afraid of adverse weather such as rain or snow.Solar Charging Panel: This smart bike tail light can store electricity by absorbing sunlight during the day, providing powerful energy for cycling at night. More environmentally friendly, long-lasting, and stable.USB Rechargeable: This auto-sensing rear bike light comes with a USB charging port, lightweight and compact, which can access to any devices with type-c port such as computers, power banks, and USB chargers to charge it.