Scosche FlyTunes AUX to Bluetooth Adapter (Black)

I'm not writing a massively long review on these, as they definitely don't warrant one.TL;DR: This product is utter garbage. Steer clear.Scosche is selling the FlyTunes product on pairing simultaneously and seamlessly to two Bluetooth headphones/devices. Erm no.... it most certainly does not do that and worse! It fails on absolutely every count imaginable.1. Pairing with one headphones.Never mind trying to sell itself on connecting to TWO headphones, it fails to connect easily to even ONE device! You hold the single button down for 5 seconds (per the instructions), and either it turns the FlyTunes off instead of going into pairing mode, or it fails to pair with the device it's actually in physical contact with(!) most of the time. Over and over again.2. Pairing with two headphones.Given it can't manage to pair to one device, when you do rarely get it to connect to one (once every 20+ attempts; taking 20 mins to get a connection if your lucky!), then trying to connect to the SECOND set of headphones, it disconnects the first ones and entirely fails to connect to the second ones, again sometimes turning itself off in the process, instead.3. Power vs. pairing button.It has just ONE button on it. This single button idea for both power on+off and pairing is a complete failure. As said above, the chip inside is so low grade quality, that it simply cannot handle both functions.4. BACKGROUND HISS!Worst of all, when you play from any source, the headphones will suffer background 'whooshing' hiss noise, which is especially bad at low volume, where most people would end-up using them for most of the time, but still there at higher volume too. It's so bad, it's like the worst cheap cassette tape hiss!And before you think this is the headphones issue; it isn't. I tried the FlyTunes with several quality sets: Apple AirPods (gen.2), BeatsX, Bose Noise Cancelling Headphones 700, Sony WF-1000XM3, and even a cheaper no-name Bluetooth headphones set. I also tried it on a Sony and a Samsung TV’s headphones sockets too.How this ever left the drawing board at Scosche is anyone’s guess. Any product designer should have spotted these failures a mile away before inflicting it on the marketplace, all while undermining their brandname. Clearly they should have used a better Bluetooth chip (BT 5 now instead of BT 4.1, perhaps?), along with better internal electronics (TWO buttons instead of one, for ease of use and quick setup, being obvious!).Useless. Don't buy this, it’s utterly INFURIATING to attempt to use, and you will be wasting your valuable time while trying to do so. Avoid.