Cat Eye Vi Z300 Taillight Cateye Vi Z300 Taillight features 3 LEDs and 800m Ah lithium ion battery comes with 300 lm output on Daytime Hyperflash mode in addition to 50 hours maximum run time on Flash mode. Vi Z300 comes with 4 modes (Constant Flashing Daytime Hyperflash Group Ride) to choose from. | Cateye | Viz300 Taillight Black