Light & Motion Seca 800 Race Bike Light Lumens: High-800 Med-400 Low-200 Runtime: High-2:00 Med-4:00 Low-8:00 Flash-24:00 System Weight 343gr Our lightweight 3 cell Li-ion pack is easily carried in a jersey pocket, hydration pack, or strapped on a top tube or seat post. It drives the Seca 800 on high for 2 hours and the Stella 300 for 3+ hours Cruise mode cycles through High, Medium, Low and Flash sequentially. When it's time to get your speed on, switch to Race mode using a two-second push and hold (starting with the light powered off). Race mode skips the Medium and Flash modes, allowing you to conserve battery power on the climbs while keeping the High setting just a click away for the descents Mini L charger 127 cm cable length Helmet or tool-lessbar mount. Optional Headstrap