Review (3/5): No rechargable battery. 1 heat setting.
Product does not have a rechargable battery. This means it must be run with an external power bank.
I have not tried this yet. I plugged it into my laptop USB and got heat as a test.
The size is inaccurate or I got the wrong size sent. I ordered an eu size 44 size /10 usa size. The insoles looks like a size 7 or 8.
This product does not have 3 heat settings as advertised.
Downside no rechargable battery plus side no weak rechargable battery. If it works on a power bank it may be a superior heat insole if you don't mind being constantly wired up.
I may update review once I use the product. Overall for now 3 stars. Because it's very cheap and potentially a better concept than a heated insole with a flimsy rechargable battery.