True Wireless Sweatproof In-ear Headphones with 30-Hour Battery Life offers true spirit of endurance and true performance. he graphene diaphragm consumes minimal energy while providing superior audio quality, so Outlier Air can optimize power to drive excellent audio reproduction for detailed highs, well-balanced mids, and immersive bass. Outlier Air features the latest Bluetooth 5.0. It is also certified IPX5 water-resistant. Constructed in a premium aluminum housing, the sleek charging case weighs a mere 54g (1.9 oz) that is small and easy to carry around. The case is also rechargeable via an included USB Type-C cable to a Type-A charging port.