Wired Rear View Reverse Backup Camera System Kit 7 Monitor with Audio, Parking. This is a wired 7 single camera system. It contains a 32ft extension cable. Each end comes with 4-pin screw-lock cable, NO RCA. It ensures that all the connections are tight and stable, no worry about bad connection. The power input of this system is from DC12 to 24V. So it can be used for large vehicles, such as trucks, buses, vans, rv and etc. With audio and parking line? 7 HD color monitor with upgraded touch buttons. It takes max 3 video inputs. Monitor has been built-in with a loudspeaker to hear what is happening hehind your vehicle. With parking lines displayed on screen when reversing to help park safely. It not only displays image for backing, but also can display it all the time. With built-in short-circuit protector and a TVS device to aviod damage caused by frequent improper vechile voltage. The image can be set as normal or mirror image by buttons, so the camera can be used as not only rear view but also front view. As the image can be set as various modes: mirror image, normal image, up-side-down image etc. So the camera can be mounted in any position of your vehicle, just press the buttons to set a right image. Waterproof and Night Vision? The camera has the highest waterproof and micro-dust proof level IP69K. It not only can resist water, but also prevent the micro-dust from entering the glass. Built-in with 18 IR lights, you can see clearly and drive safe at night or when the ambient light is low. Built-in microphone to transmit the sound to monitor to hear what is happening. Installation is a breeze. All the connectors are four pin screw-lock connectors, you just need to connect them together. Then power the monitor with DC12-24v from taillight power or battery. Then press the power button, it will work. As our valued customer, we will do our best to make sure the product you receive arrives to you on time and as expected.