Seeing is believing-sometimes literally. With smart technology, the 509 Sinister XL7 Ignite S1 Goggle leverages an in-frame sensor to monitor humidity and moisture automatically, activating the heated lens and built in fan to eliminate fog without having to lift a finger off the throttle. Features: 20% increase in face foam for 2X+ helmet shell sizes XL version seals in larger helmet shell sizes (2X, 3X, 4X) Ignite S1 technology leverages an in-frame sensor to monitor humidity and moisture automatically, activating the heated lens and built in fan to eliminate fog ITO coating warms inner lens to drive off moisture and durable PC outer lens has multiple coatings for premium clarity and performance - UV inhibitors, Hardness and anti-scratch DC fan built into low profile fan compartment for high Flow, low power, and quiet airflow S1 battery pack is moved to Left side, brake hand for easier control and access Auto mode and ON mode (Orange Light) for control and managing battery life (goggle continues to run ignite heating and fan) Manual mode (Blue Light) allows the user to control the heated lens and built in fan (user can choose which substate (Hi/Med/Low) to run and turn the fan/ignite heating on or off) Manual Mode available via 509 app Approximate Running Time: Auto = 4 hours, Manual = 8 hours 5MAG lens retention system (magnetic quick-change lens system) OTG, Over The Glasses, compatible Shuttered Venting in frame scoop air in or closes off flow Easily replaceable lenses to a broad assortment of improved lens tint technology including Polarized, Photochromatic, HCS, Ignite, or Fuzion lenses Removable outriggers Shear Bar interface between lens and frame keeps lens in place, even in hard crashes Micro USB Charging Port: Located on bottom side of battery pack (Recommended Charger for Ignite S1 is 5V, 1.5A) (To open battery door: Depress the button located on rear battery door. With button depressed, slide door upwards.) Pairs with the 509 app via Bluetooth (availab