Product Features:BT Version: V5.0Talk Range: 10mBattery Capacity: 37mAh(ear bud), 500mAh (case)Battery Life: Up to 82 hours standby time / 3.5 hours playtime / 3 hours talk time / Case provides up to 6 full chargesRich SoundA 13mm dynamic driver produces sound with flawless accuracy and treble that sparkles full of detail.Comfortable FitEar buds are ergonomically designed to conform to the shape of your ear canal. A single ear bud weighs only 3g, making it easier and more comfortable to wear.Stay ChargedA handy and compact charging case allows you to extend 3.5 hours of music playtime to 24.5, so you can enjoy all-day use.Touch ControlsA force sensor on both ear buds allows you to effortlessly answer calls and adjust music with a simple touch.