4-Port USB Keyboard and Mouse Switch,Model No. : KM0204 The KM0204 is a 4-port keyboard and mouse switch, which supports the control of 4 hosts through a set of USB keyboard and mouse, thereby improving work efficiency, reducing costs, and saving desktop space.KM0204 provides a variety of keyboard and mouse switching methods, users can quickly switch to operate the computer through the front panel buttons, keyboard hot keys, and mouse cursor. Package included : 1 x 4 Port Keyboard-Mouse Switch, 4 x USB cable,1 x Power Adapter ,1 x User Manual Boundless switching function Just move the mouse cursor to the border of the screen to quickly switch to another computer, and operate the keyboard and mouse on this computer.Please go to Kinan official website to download the switching management software. NOTE: Support four or more PC custom combination sliding screen mode. Read more Convenient one-key switching The button design on the front panel makes it easy to switch computers with one key. And with LED indicator, indicating the current connection status. Read more Synchronous switching of audio and video/U disk When the mouse cursor is switched to another computer, the audio, video, and U disk will be synchronously switched to that computer. 2 USB2.0 hubs Integrated USB 2.0 hub allows the user to have full multimedia control and share USB peripherals eliminating the expense of duplicate devices. High-quality main control chip Built-in high-quality main control chip. High performance, low power consumption, fast switching between multiple computers, bringing you a stable and smooth experience! Read more Frequently Asked Questions of 4-Port KM Switch Issue: No response from mouse and keyboard. Solution: 1.Check whether the USB cable is connected to the PC host. 2.Replug the keyboard and mouse. 3.Unplug all the USB cables of the four ports and reconnect them one by one. Issue: Can't switch between screens. Solution: 1.Check whether your switching action is correct, the default direction from port 1 to port 4 is from left to right. 2.Check whether the indicator light on the front panel is switched with the switching action. 3.Check if the mouse wheel is double-clicked, double-clicking the mouse wheel will disable/enable the cross - screen function. 4.Power off and restart the device. 5.If a computer is connected to two displays, please add a screen to the current port through hotkeys or management software (please refer to the manual for details).