I don't have much experience with Bluetooth devices so I was hoping this would work for what I wanted. I wanted to listen to my 5 CD player by the pool while the player in the pool house was closed. I read the instructions and it seemed pretty easy. I first charged the transmitter via the USB port using the cable that came with it. The red LED will turn off after approximately 45 minutes, indicating a full charge. I connected the transmitter to the CD player's stereo headphone jack with the cable that came with it, and turned on the CD player, transmitter, and Bluetooth speakers I bought for this setup. Without doing anything, the speakers produced an "I'm in sync" sound after about 3-5 seconds, and that was all that needed to be done. The sound quality was excellent. No worse than the speakers of a CD player. I can't confirm battery life. I used it for about 2 hours, worked for a day and charged it again. I also only used it about 20 feet from the speakers so I didn't check the range. I may update this review after next use. The transmitter has been used with the following speakers and is very simple. True plug and play: https://smile.amazon.com/gp/product/B07RMH3W8Y/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1UPDATE: I checked the range today and removed the speakers from the transmitter until the sound started to break . . I didn't measure with a tape measure, but it was at least 33 feet, maybe a little more. So I would say that the declared properties are true. So far very happy with the purchase.
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