Created to make your music experience smooth and comfortable, the Kreafunk bGEM Wireless In-Ear Headphones offer total freedom and no cables. Use each earbud individually or together for a stereo sound. Both feature a built-in microphone for hands-free phone calls so when connected, making and answering calls is quick and easy. Each earbud has a touch button for controlling playlists and calls when you are on the move, at work, in the gym or wherever you need to shut the world out and enjoy your music. Technical Specifications: Up to 4 hours playback time (80% vol.) Bluetooth 4.2 + HFP + A2DP + AVRCP Built-in microphone for hands-free phone calls Touch-button for controlling music and phone calls Bluetooth range: 10m Built-in lithium battery: 90 mAh in each earbud Standby time: Approximately 60 hours Charging time: 1.5 hours Charging input: DC 5.0V / 500mA LED indicator light Including four ear tip sizes CE, FCC, RoHS, WEE