Cygolite Turbo Mini 330 Single High Beam Led System Stem Mount Li-Ion Battery with Smart Rapid Charger State-of-the-art Cree LED technology for 330 lumens LED output Lightweight jet engine inspired headlight (50g) Durable weather-tight aluminum alloy headlight 6 light modes: High  Low  Boost - Flashing  Walking  SOS with run times from 2 ~ 23 hours on a single charge Includes headlight, Slim Li-Ion battery, smart charger, handlebar