1High Quality Sound: BT 0 chip module, the latest acoustic isolation technology, allows your traditional speakers to wirelessly transmit high quality sound without delay. 2Good Performance: This BT receiver adapter supports connections up to 15 meters, easy to control the remote playback of music, supports NFC, and is easy to use. 3Multi Interface: Receiving and transmitting dual modes, including RCA, AUX, OPTICAL interfaces, supporting all stereo equipment, easy switching of receiving and transmitting dual modes. 4Compatible: Connect any active speakers with a standard 5mm/0.1in port or 2RCA port, suitable for home theater, stereo, car speakers, as well as smart phones, for iPod Touch, for iPhone and for Android devices. 5Dual Machine Connection: 5mm/0.1in and 2RCA connection options, which can play music on two speakers at the same time, or connect two BT devices at the same time.