... nearby the HK, can quickly send the products to your country, reduce your cost2: factory price, ... video format, include PAL, NTSC, SECAM, compatible with post, real time transmission if no delay, multi-channel are aluminum alloy shell, multi integrated ... one channel) aluminum alloy (multi-channel)Color:Red,whiteUnshielded twisted pair transmission interface:Blinding post can be pulled outCoaxial video ...