Exposure maxx d mk13 front bike lightstay illuminated when cycling after dark or in low light, thanks to this powerful front bike light from exposure. Featuring exposures reflex technology, this light has a dazzling maximum output of 4000 lumens, so you know you'll be kept seen and safe when cycling. Lighting up your way, it is set within a durable anodised aluminium casing and has a waterproof rating of ip6, making it ideal for riding in all weather conditions.powerful rear lighton 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 efficiently as possible to maximise output and battery capacity.in the box maxx d mk13 front light bluetooth remote quick release handlebar bracket 31.8mm 35.0mm fast charger quick start guidefeatures material anodised 6063 aluminium led configuration 4x white xpl2 maximum lumen output 4000 lumens reflex boost, 2500 constant battery type 11,600 mah lithium ion maximum runtime 2 36 hours modes 9, with additional high, low and medium options within some modes charge time 6 hours charger type mains handlebar attachment quick release handlebar bracket 31.8mm 35.0mm water resistance rating ip6 dimensions 115mm x 54mm weight 310g please note comes with uk power plugbuy exposure lights accessories from chain reaction cycles, the world's largest online bike store.