Excelvan Universal Wireless Bluetooth Stereo Handsfree Headsets Sports Earphone with Mic (Gold) In-ear type with comfortable earplug. Bluetooth version: 4.0. Wireless Range: Up to 10m Built-in Microphone, Up to 24 hours talking time Enjoy stereo music wirelessly from Bluetooth A2DP devices Easy controls for Answer/ End/ Reject calls, Volume and Playback Control, Redial last call Micro USB connector charging via AC charger or computer USB port