Around The Neck Sweatproof Sport Bluetooth Wireless Headphones, Aduro Amplify Ultra Headset with Mic, Inline Controls, Noise & Echo Reduction for iPhone, Galaxy and All Bluetooth Devices (Black/Gray) Connects to mobile devices via Bluetooth - Works up to 33 feet away - Automatically reconnects to paired devices Up to 6 hours of talk or playback and 65 hours of standby on a single charge Enhanced Audio - Rich sound for music, video, and phone calls, Reduces background noise and echo Music and call Inline remote controls - play / pause, forward / rewind, answer / end call, volume up / down Smartphone battery power indicator compatible with iOS devices