Helmet light has 1 Super bright white LED which emits the brightness | power of 100 Lumens and 1 super bright red LED which emits the | brightness | power of 50 Lumens.| The light has 8 different lighting functions including various flashing and | constant functions.| 2 brackets are supplied, one for the handlebars and one for the helmet so | this light has a dual function, so it your choice.| Running time for this dual light is up to 17 hours| Comes with a low battery indicator which lets you know when the light | needs charging by flashing quickly 3 times in 18 seconds.| USB rechargeable| Lithium-ion Battery 3.7V/700mAh