Does the usb have to be plugged into my pc or xan i plug it into the back of my tv

You could try bc some smart tv with internet ready has usb port where you could plug a wireless mouse and keyboard. This overlay is just like a giant trackpad or mouse that navigate the entire tv screen, it senses the exact location of your finger like a gps.

How many actual touch points?

Dear Friend： Actually 10 point touch point.

is that work with android TV?

Some tv has usb port where you could use wireless keyboard and mouse.

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Standing screen display size	70 Inches
Screen Resolution	32768 x 32768
Max Screen Resolution	3840 x 2160
Number of USB 2.0 Ports	1
Brand	Chengying
Series	CYS-70-p10
Item model number	CYS-70-p10
Item Weight	2.2 pounds
Package Dimensions	65.25 x 3 x 3 inches
Color	Black
Voltage	5 Volts
Manufacturer	Chengying
ASIN	B07D23P244
Is Discontinued By Manufacturer	No
Date First Available	May 6, 2018

Chengying 178.1cm (70") Multi-Touch Infrared Touch Frame, Touch Screen Overlay, Infrared Touch Screen Overlay

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