ATTENTION: 1. Please PAIR this camera with your system before installation, otherwise, it will not show on your screen, because this is a new camera hasn't paired with your original system. 2. Pairing Steps: ① disconnect power of the camera, keep the new one to be connected only (please make sure the camera is powered, you could see the IR light is on in dark condition while it's powered) ② press V1/V2 button to change the channel as you need ③ press M to enter the menu ④ press SEL to start paring, then wait for 20 seconds and finished ⑤ repeat the above steps to pair the next camera