Exposure MaXx-D Mk13 provides powerful output through a combination of focused and wide lenses simultaneously highlighting the edge of the trail without compromising the far-reaching beam, perfect for aggressive riding on singletrack and technical terrain.Features:4000 Lumens Boost/2500 continuous 2-36 hour run time Reflex automatically adjusts the light to increase output when riding fast then dimming for the slower sections saving battery life OLED display panel gives clear information light status including battery life Smart Port+ enables the charge port to accept auxiliary accessories such as rear lights remote switches Support Cells and to use your light as a power bank to charge USB devices Intelligent Thermal Management prevents overheating and maximizing battery life Optimised Mode Selector allows rider to fine tune power and run times for the ride Easy to read Fuel Gauge for monitoring run timeSpecifications:Weight: 310 Lumens Front: 4000 Boost/2500 Constant Recharge Type: USB