Firstly, these aren't Bluetooth capable. It will not, for example, pair with your phone or laptop. It will not appear in the pairing list. The 1Mii E3Pro relies on the transmitter unit that converts optical or aux inputs and sends the signal to the earbuds via 2.4GHz wireless. The transmitter unit doubles as a charging dock for the earbuds. It takes a 5V input and both a UL rated charger and USB cable is included.
As the charger lacks a built-in battery, it cannot function without the 5V input which limits its mobility. The dock is huge at roughly 4.25" x 2.25" x 2". At the back of the transmitter, it has AUX and Optical inputs as well as AUX and Optical outputs. The outputs can be used to bypass the headphones and send music to your speakers or soundbar. Much better than having to manually swap leads by hand. In the package, it comes with every cable you would need to get started.
The earbuds themselves look and feel basic. It uses glossy plastic for the body and matte coating for the multifunction buttons. The buttons aren't touch sensitive but clicky which I like. The port/nozzle has a standard 5.5mm opening which allows you to use aftermarket tips. The included stock tips sealed fairly well in my ears and I did not need to resort to doing that. What's also awesome is that the earbuds charge properly in the dock even with large aftermarket tips installed.
Sound-wise, there is surprisingly very little loss via AUX connection despite it requiring an extra analog to digital conversion + transfer via wireless. Compared to another similar product that uses Bluetooth for transmission, the 2.4GHz connection seem to provide more clarity, crispness and less compression. Bass is present and impactful. I also found treble well controlled. Mids also come through nicely on vocal centric tracks. For TV use, it is frankly great with clear dialogue and sound effects come through as well as they can for earbuds. It's clearly tuned to be multipurpose.
Note that the E3 Pros have two modes: Gaming and Music. Gaming mode should be used for TV and well.. gaming because there is significantly less delay and lag in audio. However, note that there is no mic so voice chat is out of the question. I tested this via Netflix and lips synced perfectly in this mode. Music mode does offer a slight bump in audio quality and should be used if you want to stream Spotify. Switching between the modes just require triple clicking any earbud.
Overall, the 1Mii E3Pro is a good niche product purely for parents who want to watch TV at night without disturbing the rest of the family. However, the lack of Bluetooth and battery also limits its uses.
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