About the Exposure Flex MTB Light 3 LED e-bike light, the Flex is a e-mtb orientated light with an output of upto 3300 lumens in a lightweight & compact unit that uses the battery/motor system for power. It utilises our REFLEX + technology for smarter battery management & is fitted with wired remote for easy mode changes. Simple single sided forged aluminium bracket allows for central mounting position.. Key Features Cable Free Design. Intelligent Thermal Management. Optimum Mode Selector. Micro USB (Universal Serial Bus) Charging. Hand Made in the UK. About the Brand Ultimate Sports Engineering (USE) was founded in 1990 & is to this day driven by the obsession of creating the ultimate in innovative sports products. Today Ultimate Sports Engineering encompasses design & production of: Cycling components (USE) & Cycle lighting (Exposure Lights). From the company’s initial offering of the suspension seatpost, USE has had huge success in the cycling industry. Producing components that contributed to winning Olympic gold, King of the Mountains at the Tour De France & dominating the high-end lighting market in the UK & across the world, USE endeavours to push boundaries & raise standards in sport. Exposure Instruction Manual Lighting Buying Guide