Specifications‎:‎The latest bluetooth version 4.1‎.‎Support for bluetooth stereo music playback‎.‎Allows you to conveniently answer calls while driving‎.‎Can connect two phones‎.‎Type‎:‎ Bluetooth Wireless EarphoneSound Track‎:‎ StereoEarpiece‎:‎ SingleTransmission Range‎:‎ 10mFit Design‎:‎ In‎-Ear OnlyCompatible Brand‎:‎ UniversalEarpiece Design‎:‎ Earbud ‎(‎In Ear‎)‎Bluetooth Version‎:‎ Bluetooth V4.1 + EDRStandby Time‎:‎ 100 HoursCharging Power‎:‎ DC5V Power Interface [The Hole] ‎(‎Computer USB Port‎,‎ Mobile Phone Charger‎,‎ Car Charger‎.‎‎)‎Compatible‎:‎ for Android iOSSize‎:‎ 3.5cm x 2.3cm/1.38‎"‎ x 0.91‎"‎ ‎(‎Approx‎.‎‎)‎ Notes‎:‎Due to the light and screen setting difference‎,‎ the item‎'‎s color may be slightly different from the pictures‎.‎Please allow slight dimension difference due to different manual measurement‎.‎ Package Includes‎:‎1 x Wireless Bluetooth Headset ‎(‎with Built‎-in Rechargeable Li‎-ion Battery‎)‎1 x USB Charging Cable1 x User Manual1 x Assistant Headset ‎(‎with Wire‎)‎