Cast/stream from something like a computer with a 3.5mm audio jack but no Bluetooth to a Bluetooth speaker or headphones. In my case I use it as a receiver and connect a 3.5mm cable to the speakers of the PC and send a signal to it from another Bluetooth source. The device itself is slightly larger than an AA battery (as shown in the picture). - does not require AA batteries to operate), is very light and has a bright screen. The side-lit LCD screen suffers from the narrow viewing angles typical of many of these devices, but it doesn't detract from functionality or usability. The TX (transmit) and RX (receive) labels are cast on the back of the case and can be a bit difficult to read in low light. I noticed a very slight audio lag when using it to stream audio along with the video stream. , but it shouldn't make much of a difference to your stereo audio stream.
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