Item Type: Wireless Bluetooth EarbudsMaterial: ABSConnection: Wireless BluetoothWireless Distance: 20m/21.9ydBattery Type: Built in 2 x 50mAh ( Headset) and 2000mAh ( Charging Case) Lithium Ion BatteriesProduct Size: Approx. 5.8x7.5cm/2.28x2.95inPackage List2 x Headphones4 x Earbuds1 x Charging Case1 x Data Cable1 x Instruction ManualAll data are measured manually, and there are certain errors in the measurement results.1LED DIGITAL DISPLAY: Bluetooth earbuds are designed with LED digital smart power display and touch control to grasp power information anytime, anywhere. 2STEREO SOUND: Wireless earbuds with soft composite diaphragm to create a rich stereo listening effect, enjoy the bass and midrange. 3CHARGING CASE: Wireless earbuds has a high capacity charging case, not only can charge the headphones, but also can give your phone life. 4FAST CHARGING: Wireless bluetooth earphone uses Type C fast charging technology, it can help you when you are busy and need a fast charge. 5WATERPROOF DESIGN: Stereo wireless earbuds are designed to be waterproof, even if you encounter a small amount of water it will work properly, suitable for outdoor sports use.