Stay Fit‎,‎ Stay YoungWireless Headphones utilizes an in‎-ear style with ergonomically designed ear tips‎,‎ providing a locked‎-in‎,‎ comfortable‎,‎ noise‎-isolating fit for any activity while delivering clear and dynamic sound‎.‎ Combined with the lab‎-tested sweat‎- and water‎-resistant design‎,‎ this allows you to forget about your earphones and concentrate on your workout‎.‎ Whatever activity you choose‎,‎ the Jelly Comb will match your pace‎.‎Crystal Clear Sound PerformanceHeadphones are entirely equipped with the latest HD sound chip + Bluetooth 4.1‎,‎ which delivers an outstanding crystal clear sound and allowing you to enjoy your music at the Gym‎,‎ Running‎,‎ Walking‎,‎ Biking‎,‎ Gardening‎,‎ Working out‎,‎ Watching TV‎,‎ Driving‎,‎ Traveling by plane and more‎.‎ Bluetooth TechnologyThe Bluetooth version is CSR V4.1+EDR‎.‎ It is easy to pair to most Smart Phones and Bluetooth‎-enabled Tablet‎.‎ You can wear the earphone while you‎'‎re running or working out‎,‎ and do not have to stick your iPhone in pocket‎.‎Specification of BluetoothBluetooth Version‎:‎V4.1+EDROperation Distance‎:‎10mRange of frequency‎:‎2.4 to 2.4835GHz ISM bandSensitivity‎:‎‎-85dbSpecification of mp3Music format‎:‎MP3/WMARechargeable lithium battery‎:‎120mAhFeatureTalk time‎:‎up to 5 hoursMusic time‎:‎up to 4 hoursStandby time‎:‎up to 120 hours‎.‎What‎'‎s in the boxBluetooth HeadphonesEar Bud Set Micro USB Charging Cable User Guide Note‎:‎1‎.‎Before you start using the headset‎,‎ please use the USB charge cable to charge it first‎.‎ 2‎.‎Make sure you turned on the bluetooth on your phone‎,‎ search headset model on it‎.‎