This type of products can control the PTZ when you on the building site, you do not need to come to the room for the test control, it can control all the PTZ with a remote control and test the function. It will bring your work easy and efficiency. It is equal to a keyboard with monitor and make your project test easy! FEATURES: 2.5" inch LCD that can appear the PTZ speed dome sent back the image OSD menu ,easy used Various of protocols compatible, internet line test ok quicker electricity 4-5hours that can used for control NTSC PAL auto identify support RS232 and RS485