“One of the great features of Sinvitron is that you can connect two Bluetooth devices at the same time, so you can listen to the audio with two headsets at the same time. However, it is recommended that you do not use a separate speaker, as this may have latency issues.

At just 0.8 ounces, the transmitter is ultra lightweight, compact design, easy to carry and fits in awkward corners. The transmitter has a built-in battery with a 5-hour battery life. Best Bluetooth Transmitters”

http://jackyunseen.blogspot.com/2018/09/best-bluetooth-transmitters.html