Make hands-free calls and listen to music with these Sony wireless in-ear sport headphones. The wireless design frees your range of motion, and the microphone makes conversations more convenient. Listen to music for over 8 hours on a single charge with these Sony wireless in-ear sport headphones, which are moisture-resistant for use during strenuous workouts. Features In-ear design Fits securely and directs music into your ears for full, uninterrupted audio. Bluetooth 4.1 interface with NFC (Near Field Communication) technology Enables simple pairing and wireless streaming with compatible devices from up to 33' away. Supports HFP, HSP, A2DP and AVRCP Bluetooth profiles. Rechargeable battery Offers up to 8.5 hours of use and lasts up to 200 hours on standby mode. In-line microphone Lets you enjoy hands-free calls. Water-resistant housing Helps prevent sweat and water from entering the headphones