Producing 600 brilliant lumens, the NiteRider Lumina Micro 600 Bike Light is smaller, lighter, and more compact than the original Lumina series. Its compact profile and high light output make the Lumina Micro 600 ideal for helmet mounted applications, helmet mount available as an optional accessory. Using the included handlebar strap mount with quick release tab, prevents any chance of theft by allowing convenient removal and installation of the head light.Fits standard and oversize 35mm handlebars.Small compact design that's perfect for helmet mounting (Helmet Mount Sold Separately).Convenient USB rechargeable.Low battery indicator.Lock Mode, perfect for use during storage and transporting the light; press and hold power button for 7 seconds to lock out operation of light..Handlebar Mount.USB Charging Cable.Run Time: 1:30 - 21:00hrs.Quick Charge Time: 1:45hrs at 1Amp.Normal Charge Time: 3:30hrs at 500mA.Weight: 130g.Battery: Li-Ion.