Aftershokz trekz titanium blueblack
Bluetooth headphones neckband headphones noise cancelling headphones type of fitting bone conduction transmission mode cordless features microphone splashproof sweat proof functions remote control function vocal prompts rechargeable music functions pause play sound functions bass boost active noise reduction sound type powerful bass sound mode stereo range 10 m bluetooth bluetooth version bluetooth 41 bluetooth profiles a2dp advanced audio distributio