Kryptonite Incite X8 / XBR headlight and taillight set is full of clever design and performance features. The X8 Provides up to 80 Lux of clear focused light putting it where the rider needs it. Backlight buttons and LCD display provide ease of use and light status at a glance. 6 modes including steady, flash and pulse modes provide 3-24 hours of battery life before needing recharging via USB. The XBR taillight uses a built-in accelerometer to provide a brake light which increases output 3x over the steady mode. 7 Modes including a daytime brake mode for 10-36 hours of runtime before needing a recharge via USB.