The Knog Big Cobber Twinpack is a front and rear light set that offers an incredible 330° of brightness, allowing you to see clearly from all angles. In increasingly heavy traffic, this bike light is great for daytime use and increases your safety on the road. With a light output of 470 lumens, the Big Cobber flasher is very powerful indeed. With a low weight of 59 g and integrated USB charging, it becomes a handy helper that can also be programmed with the Modemaker app (including eye protection mode). Weight: 59 g 100% waterproof Dimensions: 92 x 33 mmFONT 470 LUMEN (TBC) 2 hrs. (250 LUMEN - STEADY) 15 - 60 hrs (470 LUMEN - FLASH)BACK 270 LUMEN (TBC) 2 hrs (130 LUMEN - STEADY) 15 - 40 hrs. (270 LUMEN - FLASH) LIGHTING MODES: Max, Mid, Steady Pulse, Flash, Rolling Flash, Side Flash, Disco Flash, Eco Flash are all pre-programmed. LEDS: Efficient LEDs on the board (COB) designed to provide maximum brightness levels. RECHARGE TIME: 5.5 hours (LED indicator light goes off when fully charged) BATTERY: USB rechargeable lithium polymer CHARGING SYSTEM. Standard mount, Aero Mount, 3x interchangeable straps for seatposts and handlebars with 22-27mm / 28-32mm diameter + and USB extension cable. Runtime Front Modes Lumens Runtime (hrs) Max 280 2.5 Mid 100 5 Steady Pulse 470 3.5 Flash 470 9 Rolling Flash 190 8 Side Flash 280 3.5 Disco Flash 230 7 Eco Flash 35 120 Runtime Rear Modes Lumens Runtime (hrs) Max 160 2.0 Mid 60 3.5 Steady Pulse 270 2.59 Flash 270 6.5 Rolling Flash 110 5.5 Side Flash 170 2 Disco Flash 140 5 Eco Flash 15 100