About true wireless: You will enjoy the crystal clear music without any wire limitations. No more worries about the cord bouncing, tapping, or rubbing on something. It is ultra-lightweight with an ergonomic design to suit your ears.unique backup battery case: The playtime for the earbuds is 3 to 4 hours. Portable charging case is also a battery, with a built-in 220 mAh battery to provide the headphones an extended 12 hours music and talking time.
Dual mode: The headset contains two pieces which can be used separately by you and someone else.secure, comfortable and lightweight: Earbuds are durable, fashionable and comfortable, and come with three size ear tips (S/M/L), suitable for most peoples ears. Ultra lightweight, they provide comfortable listening for hours. Product FeaturesTrue WirelessUnique Battery Backup CaseSecure & Comfortable FitLightweightSize: Length: 0.98 inchesWidth: 1.1 inchesHeight: 0.71 inchesWeight: 0.16 ounces