Product Description Description: This item is a stereo bluetooth wireless headset with high performance and high quality. The perfect construction, stereo model and ergonomic design allow the user to wear it more comfortably, even a whole day. Besides, its light weight and over-the-ear design add much coziness. Features: With built-in microphone as well as volume, play, pause, call answer and call reject control buttons. Foldable and retractable, fit to wear. Mini and shape changing as you wish, easy to carry. CSR bluetooth smart chips, ensuring call clarity and audio fidelity. Specifications: Bluetooth Version: V2.1+EDR Classic 2 Frequency: 2400.0-2483.5MHz Bluetooth Supported: Headset, Handsfree, A2DP and AVRCP Chipset: CSR Operation Range: 10m Talk Time: Up to 10 Hours Charging Time: 2-3 Hours Music Playing Time: Up to 7 Hours Standby Time: Up to 250 Hours Package includes: -1 x Mini503 Bluetooth Headphone -1 x USB Charging Cable -1 x User ManualFor more details, please refer to the user manual.