Question 1

I understand there is a built in antenna, but the picture also shows an extra antenna that plugs into the TV, does it indeed come with that?

Accepted Answer

Mine came with a little "hershey kiss" magnet mount mini whip. It won't work well for most people. I would suggest having at least a little "blade type" flat indoor antenna backup, even in the city. The TV has a standard 75 ohm cable jack.

Question 2

what channels and how many would i be able to receive on this?

Accepted Answer

The Channels you receive will depend on your provider/subscription(cable/Dish etc)

It is capable of displaying what your subscription is via your Provider Tuner just as any TV

Now I have used mine with antennae as well, It picks up about 62 channels Via that method for me

Of further note I am quite impressed with the Picture quality, for the Price it is a Bargain in my opinion :)

Hope this helps

Question 3

why is it called hdtv if it isn't even hd?

Accepted Answer

Probably like saying something is natural vs un-natural!

Question 4

Can rechargeable battery be replaced? How long do I expect the battery to last? What is the largest capacity of SD card can be used?

Accepted Answer

Hello,

Thank you for contacting us in regards to your question.

The best way to confirm specs is actually by checking the manufacturer's website (that's where we get them). Click on the Specifications tab on the item page, and look in the Quick Info box on the bottom of the page. You'll find a link to the item on the manufacturer's own site with the most up-to-date details.

Thank you, 
Newegg Support

Brand	RCA
Model	DPTM70R

Screen Size	7"
Maximum Resolution	480 x 234 resolution
Aspect Ratio	16:9

RCA DPTM70R 7" Portable HDTV

Refurbished

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Item#: N82E16889206098