he orange MDR-AS700BT Bluetooth Wireless Sports Headset from Sony is designed for playing back music and taking calls from your Bluetooth-compatible device. It has a behind-the-neck, water-resistant design for use while working out or engaged in physical activity. The headset has one-touch pairing capabilities with NFC compatible devices for fast pairing and streaming. Its built-in microphone allows you to take calls as well as listen to your music. Its built-in rechargeable battery provides up to 9 hours of music playback or talk time, and up to 120 hours of standby time.