This bi-directional USB C switch is mainly designed for users who have USB C port devices. We pay attention to product update and testing, we have done a lot of market research and testing, and compare with similar products in the market. Compared with other similar products our product performance has been optimized a lot, if are looking for a USB C switch, this would be a good choice. We have made updates and optimizations in the following areas.： 1, Bi-directional switching, can be used as a switcher and also as a spliiter . 2, Resolution and refresh rate improvement, can support 8K@60Hz 4K@120Hz, and backward compatibility, support ultra-wide screen output (3440 * 1440, etc.). 3, The update of the switching method, we not only support a key switch, but also equipped with a wired controller. 4, The optimization of the indicator, our instructions have two colors, more convenient to identify which computer is currently switched to. 5, Accessories update, we are equipped with 2 USB-C Cables and 1 power cable. 6, Switcher power supply update, our switcher design "DC5V" power supply port, equipped with a power cord. Power supply to the switcher, make the operation more stable. Please note: A small number of USB devices cannot be connected to the docking station and need to be directly plugged into the USB C switch, otherwise they will not be recognized. Example: external USB 3.1 SSD enclosure,MacBook Pro. Please use a USB-C/Thunderbolt Docking Station/Hub with better compatibility, otherwise flickering or black screen will occur. Do not use too long cable(1.5 meters) for connection between the switcher and your devices, otherwise it will flicker or the screen will turn black. This is not a USB-C hub, so it is only link activated at a time. Works as a USB C Spliiter: 1 video source can be switched between two display devices. (Two display devices cannot display the same video source at the same time) Works as a USB C Switcher: Two video sources can be switched between 1 display device, equivalent to two computers sharing 1 display device Indication of the connection between the device and the switcher： 1, Use the two included USB 3.1 Gen 2 cables to connect the "USB-C 1" port and the "USB-C 2" port to the USB-C source device (or display device). 2, Connect the USB-C cable that fixed in the USB-C switcher to the USB-C port of the monitor (or source device), make sure the USB-C port of the monitor supports video transmission and the video function is turned on. 3, The included Micro USB to USB-A cable must be connected to the power supply to power the switcher (must power the USB-C switch, otherwise the monitor will not show anything) 4, Press the "Select" button or the wired controller to switch between two video sources (or display devices). Note: If the monitor only has HDMI or Displayport port, pls use a USB C docking station. Can also connect devices such as keyboards and mice to the docking station. (Can be used as a KVM switch) Video adapters for converting HDMI, DisplayPort, VGA, DVI to USB C are not available yet, so please make sure your computer / device has at least 1 USB Type C port（support Data＆Video＆PD） before buying this USB C switch selector. A simple USB-C / HDMI adapter or a USB-C / HDMI hub is enough. Also works with USB-C /DP adapter or a USB-C /DP hub. HDMI/DP cables do not have charging capabilities, and a USB-C cable with charging capabilities is required to charge your computer. Both your dock and HDMI cable need to support 8K, otherwise you won't be able to get 8K resolution.