Zio CSR Bluetooth Music Transmitter/Adapter Dongle for TV, Desktop, Laptop, Tablet, MP3/MP4 Player, CD and DVD Players and all other Audio Devices with 3.5mm Audio-out Jack(Black) Transmit the Music/Voice to Bluetooth receiver device,switching free and relaxed. Auto paring, omit manual operation. Compact and human-friendly design, beautiful appearance, very convenient to carry. It can transmit the audio/voice signal with long disctance. Support bluetooth receiving devices such as bluetooth speakers, headset, receiver etc.