INTERLINK SPORTS NECKBAND Model;03-06-007 BASS (Bass port for superior sound) Bluetooth (Wirelessly streams music from Bluetooth devices) Microphone (Hands free call) In Ear Design (Comfortable to wear) Sweat proof Water Proof Music play time: up to 20 hrs Talk time:7 to 9 hrs Wireless headphones USB charging cables SD card Option available Battery: 250mAh rechargeable battery (Provides 20 hours playback) Comfortable to wear (Portable during sports)