The Wavefun Flex Pro features Bluetooth 5.0 with CVC 6.0 Noise Cancelling technology to deliver true pure bass audio. It is equipped with a QCC3003 processor. It comes with magnetic Suction, when not worn, magnetic earplugs can prevent headphones from tangled, easy to carry. It has IPX5 Sweat-resistant Nano Coating that ensures flawless performance in the Rain and Sweat. The Flexible neckband is easily compact with your neck, it is super light, especially suitable for sports. It delivers Crystal Clear & Surround Sound. Wherever you go, whatever you do, just keep enjoying the pure, clear music anytime and anywhere. It has a battery capacity per pcs 120mAh. and can deliver music /talking time for Up to 9 hours.