Can't really complain as battery life is mentioned in the product description but the word "wireless" in the product name should be taken with LOTS of skepticism. The transceiver needs to be connected to either of the two connected devices via a 3.5mm cable, but it also has a battery life of no more than 2 hours on a full charge. I found it to be closer to 1-1.5 hours on average, but given the price and size of the device, that shouldn't come as a huge surprise. The only other issue I've encountered is static noise. If the USB charging cable is connected to the USB port of a device that consumes a lot of power (e.g. a 40" flat screen TV), or if the AUX cable used is poorly shielded and touches each cable during use, if you do this you will hear static noise/distortion. It has performed very well for the last 2-3 months bouncing around in my backpack because it was so small, cheap and also withstood being plugged in all the time. for hours whenever I use it. The range is about the same as most Bluetooth 4.5 and earlier devices. About 25 feet / one to two bedrooms (depending on size / wall + insulation material) it's about as far away as you can go before the signal becomes unstable, and above 30 feet it's completely dead.
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