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 sports. The Ci3 Bluetooth 4.1 Headset helps you easily realize the two thoughts, controlling your music and calls by the buttons of the headset. And, its hands-free function can set free you hands from answering the call during exercise &amp; travel. Moreover, Ci3 Sport Headset with a high-grade microphone and speaker can offer you high-quality stereo sound music and clear speech. Its lightweight and compact portable size is perfectly suitable for jogging, mountain-climbing traveling, hiking, gym, etc.    <br><br><strong>Bluedio Ci3 Features:</strong>   <br>*Advanced Bluetooth Technology: <br>Ci3 Headset uses renowned Stereo Bluetooth 4.1 chip to ensure super fast data transmission and stable performance.  <br>*Super Sound Quality:  <br>Ci3 Headset uses high-performance Speaker, and supports adjusting the EQ setting, offering you high-quality audio, letting you greatly enjoy CD quality stereo sound music &amp; enhanced BASS effect. Also uses DSP Noise Cancellation Technology, bring you clear sound effect.  <br>*Convenient to controlling your music and calls:   <br>Ci3 Headset is equipped with function buttons which lets you easily controlling your music. It also supports hands-free with high-grade microphone, thoroughly setting free you hands from answering the call during exercise. <br>*Easy to use: <br>Ci3 Headset supports Voice Prompt, Voice Dial and Call Waiting, letting you easily to operate the headset. Also support Voice Prompt (Supports selecting corresponding language from English / Chinese / French / Spanish).  <br>*Integrated Multi-point Technology:  <br>Ci3 Headset Can simultaneously connect two smarts phone. So you can seamlessly switch between your business and personal phones.  <br>*Perfectly Compatibility:  <br>Compatible with almost all Bluetooth-enabled mobile devices such as, for iPhone 6S 6 iPad iPod, for Samsung Galaxy S6 Note 5 other Android / iOS Smart Phones, Tablet PC, Laptop, etc. Also supports auto-reconnect. <br>*Ultra-low Power Consumption:  <br>Up to 5 hours of continuous Music and Talk Time, 160 hours of Standby Time per charge cycle. Low power alert; Supports Over-Charge/ Discharge protection.  <br>Use creative ergonomics design, flexible neck-strap, lightweight and comfortable to wear and easy to custody. <br><br><strong>Ci3 Specifications:</strong>  <br>Brand Name:  Bluedio <br>Model Number: Ci3  <br>Bluetooth Version: Bluetooth 4.1; Class 2. <br>Supports HSP, HFP, A2DP, AVRCP protocol.  <br>Operation range: Up to 10 meters  <br>Transmission Frequency Range: 2.4GHz ~ 2.48GHz <br>Frequency Response: 20Hz~20KHz   <br>High-quality 3.7V / 60mAh Rechargeable Li-ion battery <br>Music Playing Time: 5 hours (The Music Volume will affect the time) <br>Talk Time: 5 hours  <br>Standby Time: 160 hours <br>Charge Time: 2hours  <br>Charge Port: Micro USB <br>The Cable length: 62cm  <br>Color: Black, White (Optional)  <br>Main item weight: 18g / 0.6oz  <br>Package size: 20.0 * 10.0 * 4.5cm / 7.87 * 3.74 * 1.7in  <br>Package weight: 231g / 8.1oz <br><br><strong>Package List:</strong> <br>1 * Ci3 Bluetooth Headset  <br>1 * USB Cable <br>2 * Eartip  <br>1 * English / Chinese / French / German / Spanish / Japanese User Manual