Features:1 Music Receiver (Hands Free): A high-tech wireless device that accepts Bluetooth-enabled mobile phones or other audio devices 2 Use all audio inputs: for example car audio or home audio with a 3 5mm audio interface 3 With wireless Bluetooth technology: Enjoy high quality music in the office or in the car 4 Make and receive calls 5 Hands-free function Descriptions:1 Embedded echo cancellation microphone 2 Switch between music and phone with one button 3 About 4 hours of music/play time, 1 hour for full chargeSpecifications:Bluetooth: V4 2Connector(s): 3 5mm JackType: AdapterColour: Blacksize:58*13*13mmPackage Included:1 set * 3 5mm audio Bluetooth transmitter receiverNotes:1 Due to differences between different displays, the picture may not reflect the actual color of the item 2 Physical errors may exist due to different personal measurement techniques Thank you