Miko - Aero Compression Leg Massager with 6 Modes, 4 Intensity Levels, 3000mAh Battery, Advanced Airbag Technology - Black

Yes it comes with a charging cord. But that if it didn't for some reason you can use your usb C phone charger.

I have been using this Aero Leg Massager 13 mo after double knee replacements. I’ve had a fair amount of muscle pain. I think there are 22 muscles from your hip to your ankle and the massager is helpful. I would recommend.

There's only one in there. However you can use it for either leg.

Yes it comes with a usb C cable.

I don't know exactly, however I don't have a small thigh and there was a lot more room.