Efficient Bike Light: With a max output of 400 lumens and equipped with a fast-charging USB-C port, it supports large current charging, effectively reduced charging time. Secure Anti-glare Lens: The "anti-glare" design of RN 400 moves the light beam downward to avoid blinding the oncoming motorists or pedestrians, increasing night riding safety on the road. Easy To Read Battery Indicator: At standby mode, short press the power button will automatically display the power status of the RN 400 for three seconds. Multi-functional: Designed with a mount, the RN 400 can be tightly installed on the helmet, handlebar, or under the camera. Suitable for urban riding and daily commuting.