The SONIDO wireless headphones stand out because of their pocket size. They have very good sound quality and are light and comfortable. They are equipped with a 350 mAh docking station, which is used for convenient storage and charging of headphones. A multi-functional button can be used to stop and rewind songs and answer / end calls. Each of the headphones is equipped with a 50 mAh battery, which allows for about 3 hours of listening to your favorite music. The headphones have a built-in microphone which allows you to make calls. Specifications: bluetooth version: 5.0 + EDR, standby time approx. 500 hours