The Exposure Flex MTB E Bike Light is a 3 LED E-bike light with an output of upto 3300 lumens. A lightweight and compact unit, this light uses the battery/motor system for power. Exposure designed this light to use their REFLEX + technology for smarter battery management, it has been fitted with a wired remote for easy mode changes. The simple single sided forged aluminium bracket allows for a central mounting position. REFLEX+ automatically adjusts the light to provide boosted output when riding hard and fast then intuitively dimming for the slower sections, such as climbs. This is all to optimise battery capacity, to provide extra light when needed and save it when not required. Reflex achieves this by using data from 3D digital accelerometers including gyroscope and thermistors. It continually analyses the data to make seamless adjustments to benefit the rider. In reality it is a form of artificial intelligence. The selected runtime will be achieved by averaging the output over the period. Exposure Flex MTB E Bike Light Specifications Motor Compatibility: 6v/12v Bosch, Shimano, Brose, Yamaha LED Configuration: 3 x White XHP35 Lumens: Upto Max 3300 (Dependent on your battery and motor configuration) Battery: N/A Runtime: N/A Rechargeable: N/A Charge Time: 8 hours Weight: 60g Material: Anodised 6063 Aluminium Water Resistance: IP6 Length: 34mm Head Diameter: 45mm Cable Length: 135cm In the box: Flex E-MTB, Fixed handlebar bracket, Quick start guide. System Compatibility - Exposure e-bike lights directly connect to the motor output and use the bikes battery for power. Outputs from the various manufacturers and the models available differ from 6v to 12v, and max allowed amps. The Exposure Fuse and Flex automatically detect the system voltage and adapt to the available power, and are therefore compatible with most motor systems.