Featuring high sound performance and advanced technique， this Surround Sound Bluetooth 4.1 Music Headset will definitely bring you remarkable sound experience! The considerate design will bring you comfortable wearing， while the large capacity of the battery allows you to enjoy music without worrying. The smart Bluetooth function is easy to match and control， even the EQ can be adjusted according to your flavor. What are you waiting for? Get one and start a fabulous music adventure!                                    Features            Superior surrounding sound effect to bring you remarkable experienceSmart Bluetooth function for easy matching and controllingSupportive for APP to realize controlling on your mobile phoneAdjustable EQ to meet your requirementBattery with large capacity to ensure long working timeReasonable design for comfortable wearingCan be used also for phone talking                                                            Specifications            Color    Black    <br>Material    PC    <br>Bluetooth Version    4.1    <br>Frequency Range    20Hz-20KHz    <br>Operating Distance    Up to 10m (Free Space)    <br>Bluetooth Profiles    HSP， HFP， A2DP， AVRCP    <br>Impedance    16Ω    <br>Sensitivity    110dB    <br>Transducer Type    Dynamic    <br>Distortion    ＜0.1% (THD)    <br>Music Time    40 Hours    <br>Talking Time    45 Hours    <br>Standby Time    1625 Hours    <br>Charging Time    About 2 Hours    <br>Operational Temperature    -10℃ to 50℃    <br>Dimensions    (2.95 x 2.64 x 3.35)" / (7.5 x 6.7 x 8.5)cm (L x W x H)    <br>Weight    7.2oz / 204g    <br>                                                            Package Includes            1 x Bluetooth Headphone1 x USB Charging Cable1 x User Manual1 x Audio Cable