Exercise is good for the body, but if you listen to music while exercising, you brain will even work better. People not only like listening to music while exercising, but also don't want to miss any important calls while exercising. With the Wireless Sport Stereo Bluetooth 4.1 Headset, you can enjoy music and pick up calls with the button of the headset. And its hands-free function can set free your hands from answering the call during exercise. Moreover, this Sport Headset is lightweight and portable, and has a high-grade built-in microphone and speaker which can offer you wonderful sound quality. It's suitable for driving, business, traveling, ect.  <br><br><strong>K10 Features:</strong>  <br>Strong Compatibility: Compatible with almost all Bluetooth-enabled mobile devices such as, for iPhone6S Plus 5S, for Samsung Galaxy S5 S4 S3 / Note 4 3 2, for HTC One, Tablet PC, Laptop, etc. <br>Super easy and fast paring with your smartphone or other Bluetooth device for high-fidelity stereo music, movies and chatting. <br>Perfect sound Quality：With Bluetooth 4.1, it makes sure high-fidelity sound quality and stable performance.  <br>Built-in high-performance Microphone and Speaker, it offers you stereo sound effect(Perfect sound Quality and clear communication effect.)  <br>Enhanced Audio and Bass Response, Crisp Treble, Natural Alto, Deep Bass. <br>Integrated Multi-point Technology: it can simultaneously connect two smarts phones. So you can seamlessly switch between your business and personal phones. <br>Supports hands-free call, voice prompt and number reporting. <br>Multi-functional Button: Supports answer and end a call with "yes or no". Supports vibration for incoming calls and last number redial. <br>Endurance Time: Built in rechargeable Grade A polymer 55mAh battery, it provides up to 5 hours of continuous talking time, 4-5 hours of music time and up to 500 hours of standby time. <br>Low power consumption, Supports low-battery warning. <br>Suitable Occasion: Its lightweight is comfortable and easy to carry and custody. It's suitable for driving, business, traveling, ect. <br><br><strong>K10 Specifications: </strong> <br>Model: K10 <br>Bluetooth Version: Bluetooth 4.1 <br>Bluetooth Profile：Supports A2DP <br>Transmission Power: Class 2 <br>Operation Range: about 10 meters (no space) <br>Frequency Response: 2.4GHz-2.48GHz <br>Impedance: 32ohm  <br>High-quality Built-in Grade A Rechargeable Li-ion 55mAH battery <br>Talking Time: 5 hours (The Music Volume will affect the time) <br>Standby Time: 500 hours <br>Music Time: 4-5 hours <br>Charging Time: 1-2 hours  <br>Color: Black  <br>Item Size: Approx. 5.3 * 1.2 * 0.8cm / 2.07 * 0.47 * 0.31in <br>Item Weight: Approx. 7g / 0.25oz    <br>Package Size: Approx. 11.5 * 8 * 0.1cm / 4.52 * 3.15 * 0.04in <br>Package Weight: Approx. 17g / 0.64oz  <br><br><strong>K10 Package List:</strong> <br>1 * Bluetooth Headset <br>1 * Earmuffs <br>1 * Earhook <br>1 * USB Cable <br>1 * User Manual(English)