This product is amazing, it does exactly what it says in the ad. Battery life and sound quality are pretty good for the size of the product, Haven't used much for calls but the mic seems to work really well too.
Using it indoors is perfect, gave a new life for my wired Bose QC25, allowed me to repurpose my old headphones and save a lot of money for not needing to buy a new one wireless. However using it outdoors for example going to buy groceries or walking to the office it has a really annoying interference, like if your music is skipping 1s every 5 seconds. Maybe the bluetooth strength is just too sensible and weak so anything can mess with it. If my phone is on my pocket it will happen every 5 seconds, if its on a pocket in the jacket (closer to the headphone) its around every 10 seconds and if I keep my phone in my hand will hardly occur. Not ideal but will do, maybe its too much to ask for a device so small and cheap(ish).
Most of my time is listening to music and podcasts indoors anyway plus the fact that now my headphone is wireless makes me satisfied with the product.