Features: Support A2DP / IOPT, using the latest BT 2.1 technology, and support A2DP agreement, not only greatly improve the data transfer rate, but also to ensure a more stable and sound quality of audio stream. With the newest digital analog audio decoding function. With multiple audio input port, offers larger range of application. Support HiFi. The newest CRS with high-version wireless BT transmission technology. This product uses optical, coaxial and 3.5mm audio port design to ensure the super sound quality and easy to connect with all suitable devices. This product can memorize 10 groups of BT devices which paired with it already and automatically pair with them when the next time you use them. If your devices with BT function and support BT A2DP agreement such as, Television, Blu-ray DVD, Smart Phones, Computers, etc can be used with this BT Digital transmitter. Applications: Set Top Box, for Apple TV Box, Television, Blu-ray DVD, Audio power amplifier and other suitable devices with Optical, Coaxial or 3.5mm audio output port. Ultra-low power consumption With the compact and portable design.