Optimum still on Amazon. Neckband. Comes with case, charging cord and extra ear pieces.

IPX7 Waterproof Rating

lithium polymer battery allows seamless enjoyment of music for up to 16 hours and 240 hours stand-by with a charge of only 1.5 hours

Sound Isolation Technology: Connect seamlessly with all Bluetooth enabled devices up to 30 feet （10m） away. With Noise Suppression