It's a windscreen wiper… For your motorbike helmet
Rainy Seasons are now no longer trouble as Helmets have come with wipers | AutoNCell
Cyclist Helmet Wiper Blades : motorcycle driving
Amazon.com: GoolRC Universal Motorcycle Helmet Electric Wiper Motor Helmet Windshield Wiper Compatible with Most Visor : Automotive
Green World 2pcs/lot wiper shield finger, visor cleaner,motor janitor,water drain for a helmet,a janitor on a finger|tool container|helmettool box drawer organizer - AliExpress