We are glad to offer you this SM-B1 Fashion Sport Wireless Bluetooth 4.1 In-Ear Earphone Headphone Headset! This earphone is designed with durable materials to withstand sweaty workouts. It features an active design that fits comfortably and stays put for all levels of exercise. The easily accessible on-ear controls let you keep moving while you control your music or calls. Bluetooth function for high-fidelity stereo music and clear speech. It eliminates the white noise and delivers a clean audio experience offering hours of pure enjoyment. Wearing it while you are doing sports， you will get much convenience and pleasure!                                    Features            In-ear with ear hook style， the best choice for sportsLightweight and easy-to-use， you will even forget you are wearing itSupport hands-free， voice dial and redial， offering you the total wirless freedomDesigned with users in mind， gives you the most comfortable wearing experienceCompatible with almost all the Bluetooth-enabled devicesEnjoy your favorite music anytime anywhere                                                            Specifications            Bluetooth Version    4.1    <br>Connecting Interface    Micro USB    <br>Cable Length    0.6m    <br>Talk Time    5 huors    <br>Music Time    5 hours    <br>Standby Time    150 hours    <br>Charging Time    1.5-2 hours    <br>Suitable for    Portable Media Player， Mobile Phone， Computer    <br>Color    White    <br>Dimensions    (28.74 x 1.57 x 0.39)" / (73 x 4 x 1)cm (L x W x H)    <br>Weight    0.6oz / 17g    <br>                                                            Package Includes            1 x Bluetooth Earphone1 x Charger Cable1 x User Manual