The Big Cobber Front Bike Light produces an incredible 330 of light, so you'll be clearly seen from in front as well as from both sides. It's brilliantly effective at attracting attention day and night, making it one of the safest lights you could choose 18 factories told us Cobber would be impossible. We were happy to prove them wrong Features: Powerfully bright 470 lumens Simple Button - Big Cobber Front is simple to operate. A long press of the single button will turn the light on / off, and a short press will cycle through the modes. Packed With Innovation - Efficient Chip on Board (COB) LEDs provide maximum brightness level for up to 90% of the battery burn time. As well as 8 pre-programmed modes, it's compatible with Knog's ModeMaker app so you can customize your light modes Mount With Ease - Cobber comes with tool-less removable silicone straps for handlebars 22 - 32mm+ and head tubes up to 200 mm in diameter. Also includes a standard and aero mount Integrated USB Connector - Big Cobber plugs directly into USB-A ports. When your Cobber is running low on battery, a red ring will light up around the button. This ring will turn green, then off once fully charged Specification: Bulb Type - Chip On Board (COB) LEDs Light Output - 470 Lumens / Eco-Flash 35 Lumens Light Modes - 8 total, 4 standard, 4 Eye Saver modes Programmable with ModeMaker - Yes Aero Seat Post Compatible - Yes Low Battery Indicator - Yes Fits Handle Bars - 22 - 32mm+ diameter / 200mm Run Time - High: 120 hours, Low: 2.5 hours Charge Time - 5.5 hours Rechargable - Yes (integrated USB-A connector) Weight - 62 grams Dimensions - H: 22 mm x W: 33 mm x L:93 mm Waterproof - Yes, IP67 rating Operating Temperature - -20 to 50 C / -4 to 122 F Strap Material - Medical Grade Silicone Optimum Charging Temperaure - 20 to 22 C / 68 to 72 F (Room Temperature)