What you are viewing is a Security Speed Dome Camera Keyboard Controller, to conveniently and fully control your security cameras, this dome camera keyboard controller is a great choice! Security speed dome camera keyboard controller and control up to 32 speed dome cameras. Features 2000 feet maximum distance communication, the dome camera keyboard controller provides great performance. Maximum of 255 addressable preset points and 1~6 tours. Using EIA/RS-485 electrical interface between the keyboard and the receiver.Practical and reliable, the security camera keyboard controller is what you need, do not miss it!