Exposure maxx d mk2 sync front lightusing exposure's reflex technology this light which is housed in an anodised aluminium casing, offers a powerful output due to a combination of focussed and wide lenses, this highlights the edge of the trail without compromising the far reaching beam, making it the perfect light for aggressive riding, should it be on singletrack or rough terrain.exposure's reflex technology automatically adjusts the brightness of the light depending on your current surroundings,. Powerful rear light on the rear of the light there is an in built oled status display that shows all the key information you require, programme and mode information plus battery time remaining in hours and minutes. Intelligent thermal management controls the temperature of the leds ensuring your light will never overheat and remain as efficient as possible, connect to the sync bluetooth app and this will offer you full control of the light which is useful when using more than one compatible sync light. Technologiesoled status display osdan led display panel that gives clear information on which mode the light is in, runtime remaining in hours and minutes, percentage charged and feedback information during oms. Patent protected. Intelligent thermal management itmpatented circuitry within the light will reduce power to the leds, if they go beyond the optimum temperature, keeping the light as efficient as possible to maximise output and battery capacity. Features material anodised 6063 aluminium led configuration 4x white xpl2 maximum lumen output 4,000 lumens reflex boost, 2,500 constant battery type 11,600 mah lithium ion, usb rechargeable maximum runtime 2 36 hours modes 9, with additional high, low and medium options within some modes charge time 6 hours charger type usb water resistance rating ip6 dimensions 115mm x 54mm weight 310gin the boxmaxx d mk13 front light bluetooth remoteqr handlebar bracket 31.8mm 35.0mmfast chargerusb charge cablequick start guidebuy exposure lights accessories from chain reaction cycles, the world's largest online bike store.