The price-performance ratio is right in this product. The battery life is very good, depending on the application of the battery lasts me a whole day. The transfer is easy on the next 20 meters without interference (clear, depending on the application internally in the household or open terrain). In the house I had no problem between 2 poles, outdoors, there were certainly scarce 20 meters (greater my reason not)
My personal opinion:
All in all, the true value for money with this Bluetooth transmitter. Nevertheless I forgive a strong buy recommendation because the quality of the article is true: 5 out of 5 stars.
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Packaging and delivery was again typical Amazon 1A!