This hat is amazing for the price. You connect it to Bluetooth, and then whatever I put in the app, it appears on the hat. I did have some trouble at first getting it to charge, because I was too afraid to push the USB cable connector hard enough to get it all the way in. But once I got it all the way on, a charging icon appeared. I haven’t tested it in the field yet, but I can confirm that it stayed on for at least 2 hours after fully charged and it was still going strong. Also, the power connector is very delicate. Be gentle until you get it all the way on, then you can push it hard