The Six Pack’s deep reaching and open beam is our brightest yet for intense shreds and the high capacity battery stores enough power to last the duration of the longest endurance events, just use the OMS (Optimised Mode Selector) to choose the runtime for your needs from 2 to 36 hours. Together with Reflex++ the Six Pack will automatically give you the perfect lumen level no matter the ride .The Smart Port utilises the large battery as a power bank for your other devices for an overnight bike packing adventure; there aren’t many off road riders who couldn’t benefit from a Six Pack.Reflex+ - 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, probably better than the rider can. In reality it is a form of artificial intelligence. The selected run time will be achieved by averaging the output over the period.Key Features: Weight: 386g, Lumens: Max 3600 (Reflex 5000), Runtime: 2 - 36 hours, LED Configuration: 6 x White XPL2, Battery: 15500 mAh Lithium Ion, Rechargeable: Through Case USB, Charge Time: 8 hours, Material: Anodised 6063 Aluminium, Water Resistance: IP6, Length: 118mm, Head Diameter: 61mm, Six Pack MK11, QR Handlebar Bracket (31.8mm - 35.0mm), Fast Charger, QS Guide.