Features brand new and high quality<br/> Equipped with Bluetooth-compatible 3 5.0 chip, stable transmiion without delay, lole sound quality;<br/> Bluetooth-compatible receiving and transmitting two-in-one, driver-free, plug and for play;<br/> LCD high-definition digital display, Bluetooth-compatible mode and working status are clearly visible;<br/> The for launch mode can display the pairing name, actively search, and refuse to connect blindly (this function is the first of its kind);<br/> Built-in 170mAh polymer battery, continuous listening to songs for about 4H, USB direct plug charging/power supply;<br/> Support TF card playback, but also card reader and computer external sound card;<br/> Built-in high-definition microphone, support hands-free calling/listening to songs/navigation;<br/> Memory function, it will automatically reconnect after the first pairing;<br/> Barrier-free signal about 10 meters/33ft stable transmiion;<br/> Specifications: Size: approx 75x25x12mm/2.95x0.98x0.47in Material: ABS+PC Model: K15 Technologies: BT5.0 chip Support AUX output; TF Card Playback Operation Range: Up to 10m / 33ft (without any blocking objects) Color:Black COnnection: USB Battery: Built In 170mAh polymer battery Note: There might be a bit color distortions due to different computer resolutions. There might be size errors due to different computer resolutions. Package Includes: 1PC x Audio Transmitter Receiver Adapter 1PC x User Manual