Use Bluetooth transmission to watch movies while exercising. Connected to my TV's RCA audio output. Use old BLE headphones to watch a movie. Very slight audio lag with my headset, but not enough to make a difference - at least during a workout. The bass could be better but that and the lag may be due to my headset and not this product. I'm not sure if my headset supports aptX Low Latency or not. There's some background noise, but that may be because I'm using the TV's USB port to power it. Setup can be a bit confusing. There is a button to choose between sending or receiving. Everything else (power on/off, charging, pairing, etc.) is done with a single button on the top of the device. Now that it's paired, all I have to remember to do is turn it off when I'm done watching. My TV cuts USB power when it's off, draining the transmitter's battery. The device is approximately 1.5 inches in diameter and 0.3 inches in height. It includes multiple cable options, including RCA to headphone minijack, which was a big draw for me. I haven't tested it with two simultaneous headsets yet. I haven't tested the reception either. I'll update this review if I ever use either one. Since the device only works one way at a time, I'm assuming you can't use it for phone calls or anything else that requires two-way communication. Overall, the price is good, the device is very small, the background noise is minimal, the latency is minimal and the sound quality is good. The extra battery life is a bonus. He does what I want. I will probably order another one for another TV.
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