Pairing tech and eco-friendly material is music to the ears! These TWS earbuds are made from 35% recycled wheat husk and support wireless technology V5.1, allowing up to 4 hours of playback time. If you are on the go, even better! The charging case allows you to recharge the TWS earbuds up to three times, so never a tuneless moment. The earbuds themselves can be used in mono or stereo mode and have a built-in microphone and a multi-function button to answer, reject, redial last incoming calls, and play/pause.