Note:Please pay attention that there is two kinds of products: 2pcs camera or 4pcs camera.<br /><br />Overview:<br />This item is 2.4G Wireless DVR｣ｬ it contains one 7'' LCD monitor and 4 waterproof cameras. It works by digital transmission and displays 4ch monitoring pictures on LCD monitor.This product has the functions of voice monitoring｣ｬAV output and waterproof. It is suitable to use both indoor and outdoor places.<br /><br /><br />Features:<br />*2.4GHz 7 inch TFT LCD Monitor｣ｬ 640*480 resolution.<br />*4CH digital wireless camera and DVR system.<br />*Camera shell uses metal material｣ｬ IP66 waterproof grade.<br />*The camera built-in 24 IR LEDS｣ｬ can get clear vision both day and night.<br />*7'' monitor wireless transmission distance up to 200 meters in the open area｣ｬIf using indoor｣ｬ with wall or other barriers｣ｬ signal will be weaker｣ｬ transmission distance will reduce.<br />*Built-in Microphone of the camera and Speaker of the Monitor｣ｬ voice monitoring anywhere anytime.<br />*With antennas with them｣ｬ more stable transmission.<br />*Support Audio and Video output.<br />*Simple installation no cable required.<br /><br /><br />Monitor Specification:<br />LCD: 7inch TFT<br />LCD Resolution: 640*480<br />Receiving Sensitivity: -85dBm<br />Power Supply: DC 5V<br />Built-in Battery Type: 1*3.7V 1020mAh Lithium Battery<br />Video Output:1.0Vpp<br />Audio Output:1.5Vpp<br />Max. Support TF Card: 32GB(not included)<br />Transmission Frequency:Ism 2400-243