This Lenovo wireless earphone is chiefly designed for long-time and high quality of play. The awesome stereo earphones not only equipped with the fastest and stablest BT 5.2 , but also built-in the premium CVC noise-canceling microphones which allow you an ultimate music pleasure. What's more, the earphones come with large capacity of battery providing 8 hours of paying time, absolutely the best choice for gym sports, running, jogging, etc. Type: In-EarMaterial: Metal,Silicone,TPEFeatures: Surround SoundWearing type: NeckbandMain Functions : Answering Phone,Bluetooth,Microphone,Noise Cancelling,Sweatproof,Voice Prompt,Volume Control,WaterproofApplication: Running,SportCable Length (m): 0.6mCompatible with: Mobile phoneConnectivity: WirelessFrequency response: 20-20000HzCharging Time: about 2 hoursStandby time: about 120 hoursWorking Time: about 8 hoursBluetooth: YesBluetooth distance: W/O obstacles 10mBluetooth Version: V5.0Battery Type: Built-inBattery Capacity(mAh): 80mAhPackage weight: 0.160 kgPackage size (L x W x H): 21.00 x 16.50 x 3.00 cm / 8.27 x 6.5 x 1.18 inchesPackage Contents: 1 x Pair of Earphones, 1 x English Manual, 3 x Pair of Eartips, 1 x USB Cable