Light Mode – High / Mid / Low / Strobe Silicone Strap Suitable for most bike handlebars (18-38 mm) Maximum brightness – 200 lumens. Enough to burn a road about 50 feet in front. Specially designed for night riding on bicycle. Battery – Lithium Polymer 800 Mah. Charging time – 2 hours. Automatically cut-off system when fully charged. charging indicator. Lighting Time on Full Recharge – 3 Hours (High Brightness) / 4 Hours (Mid Brightness) / 6 Hours (Low Brightness)