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What does the K V S P G TV of the video intercom indoor extension motherboard stand for respectively?
Don't call the master, you can take out your visual intercom display and use it as a small monitor. Keep the contrast switch board on the original display module, and there is a 4P socket at the other end. General power supply is four places, black and white power supply is 15- 18V, and color is 12V. You can monitor the video.