[Receiver Mode] BTI-029 Bluetooth Receiver change the traditional speakers or headphones into Bluetooth-enabled ones. After paired, play music wirelessly from your Bluetooth-enabled Smart Phones, Tablet and more without the hassle of cables. [Transmitter Mode] BTI-029 Bluetooth Transmitter can be connected to the audio devices (such as MP3, MP4, TV and PC, etc.) without Bluetooth function via the included 3.5mm audio cable or optical Toslink cable, and making it work with Bluetooth-enabled Headset and Speaker. [APT-X Low Latency] When transmitted over a Bluetooth connection, aptX Low Latency Technology enables high quality and low latency in audio, making the sound stay in sync with the video, giving you a perfect synchronization audio and visual experience. [Multi-point Connection] In transmit mode, BTI-029 can pair with two Bluetooth-enabled headphones or speakers to play music simultaneously. In receive mode, it can pair with two smart phones at the same time. You could choose any mobile phone to play music, but the other one need to pause or end the music. [Low Power Consumption] Built-in 350mAh rechargeable Lithium battery ensures up to 15 hours working time (AUX) or 12 hours of working time (SPDIF), you can enjoy wireless free all day long. Simple use, no need to download any APP.