yl_fang

if that's the case, you can find a lot of cameras support both NTSC and PAL

Theoratcally analga tech coun't go over than 700 TVL, more than that are actually facke parameters although most factory are marking like 900, 1000

Basically what　Ｉrecommanded is P2P cameras. It supports wired and wireless. It doesn' need dvr. P2P supports connection and control directly with pc or mobile. However, if you do like to have a dvr, try the one you find on cosco or another brand swann. I also know there is all in one system which monitor with dvr embeded, but it's not being selling at cosco.

It's not necessary to be wireless. It's more like a mini dvr+camera, if you need multiple cameras, you can control them through pc or mobile individually

right， that high TVL is kind of cheating, but few and few understand tht, so don't care too much on that parameter, just focus on the pix

I don't think you need dvr though

There are some all in one system you may find on the market, P&P

why don't you try P2P head shaking cameras