Brand New Krash! Bluetooth Speaker Multisport Helmet, Youth 8-14+ (54-58cm), Black, One Size Makes you 200% more AWESOME! Krash Bluetooth Speaker Helmet is equipped with a built-in wireless speaker so you can jam out while you ride! The helmet pairs with any smartphone through Bluetooth technology with a 3 hour run time. Helmet is USB rechargeable (30 minute charge time) and comes with a charging cord. Power indicator light with notification sounds let you know when you are good to go! Rock on!