Tablet Pc List Hardware Tablet PC?

Hardware Tablet PC? - tablet pc list

Do you know of any device that meets all the requirements below?

I want a tablet PC, which is compact.
The screen should be no larger than 9 and not less than 4 ".
I do not need a separate keyboard.
I want a touch screen that can be signed by customers.
I need a storage capacity of at least 500M
I want the processor 5 to 1 GHz,
If possible, I would like a built-in barcode reader, if you need to be measured easily and with no wires or cords remain connected.
You need to add wireless functionality, a card reader, etc.
You must be sustainable and I buy in the shop directly.
You need to have a good battery charger and simple.
I do not want to spend no more than $ 500 each, including delivery.