Listening to music while doing sports gives you optimal enjoyment and good health. At the same time， you certainly don’t want to miss any important calls while exercising. The Wireless Headphone Sports Stereo Headset In-ear Neck-strap Sport Music Earphone Hands-free with Mic can easily meet these two needs for you. Its hands-free function can set free your hands from answering the call during exercise !#!amp!*! travel. What’s more， the high-performance built-in microphone and speaker offers you gorgeous sound quality. It is perfectly ideal for jogging， mountain-climbing， traveling， hiking and other sports.                                    Features            Use the renowned Stereo Bluetooth CSR8635 / 4.0 + EDR chip to ensure high-fidelity sound quality and stable performanceBuilt-in high-performance Microphone and Speaker offer you HIFI sound effectSupport Multi-pairing: can simultaneously connect two smart phonesSupport hands-free call and voice promptUp to 6 hours of continuous music time， 4-6 hours of continuous talk time， 150 hours of standby time per charge cycleIn-ear design， comfortable to wear                                                            Specifications            Material    ABS    <br>Microphone    Yes    <br>Cable Length    53 cm    <br>Color    Green    <br>Weight    0.46oz / 13g    <br>Bluetooth Version    Bluetooth 4.0 (Bluetooth Chip: CRS8635)    <br>Supports    HSP， HFP， A2DP， AVRCP Protocol    <br>Operation Range    Up to 10 meters    <br>Power Supply    Built-in Rechargeable Lithium Polymer Battery    <br>Music Playing Time    4-6 hours (The Music Volume Will Affect the Time)    <br>Talk Time    6 hours    <br>Standby Time    150 hours    <br>Charge Time    ≤2hours    <br>Charge Port    Micro USB    <br>Charge Output    DC 5V    <br>                                                            Package Includes            1 x Bluetooth Headset2 x Pairs of Earcaps1 x Pairs of Ear Hook1 x USB Charge Cable (0.4m)1 x English User Manual