Achieve ideal visibility while riding your bike at any speed with the Radius F1 Smart Bike Light. Offering up to 650 lumens, the Radius F1 smart front bicycle light provides smooth, speed-controlled light output. The built-in gyroscope sensor continually measures your riding speed and adjusts itself accordingly. Likewise, it offers higher light output when riding faster and less light on the street if you ride slower. This ensures your visibility is always optimal for your speed, and it helps save battery power. Additionally, the Radius F1 switches into a safety-enhancing pulse mode automatically when you take a turn to warn incoming traffic. It also flashes to alert others on the street if you come to a stop. The Radius F1 features an IPX7 waterproof rating and easily attaches to your handlebar using the user-friendly TurnLock mounting bracket. The Bluetooth remote control conveniently mounts next to your hand on the handlebar. Furthermore, the PerfectPower feature saves battery by turning off the light if you don’t use your bike for over three minutes. Finally, simply snap the magnet-equipped charger to the light and recharge.