Noted: the link have two model, one is for 4K 60Hz, other is for 4k 30Hz, but the description for 4K 30hZ, So please select model what your request!!!!
The 4x1 HDMI switch allows 4 PCS and HDMI ports to be switched to a single
display terminal via remote control, buttons on unit or the keyboard. The HDMI
switcher can support all hd formats including 720p, 1080i, 1080p, 4K/30Hz, multichannel audio. It can be used in office, meeting room and teaching, etc.
Supports 4 HDMI inputs, 1 HDMI output;
Support 3D;
Support highest video resolution 4K/30Hz;
Support 6Gbps data rate for tmds clock up to 600MHz;
Support 24/30/36 bit deep color;
Can automatically switch HDMI input port (in 4 ports, the last one is priority);
Support standard AWG26 cable, input up to 8 metres, output up to 8 metres
(4K/30Hz or lower);
Supports USB 2.0;
Supports 4 USB host (PC), 2 USB device (mouse/keyboard), 2 USB 2.0;
Supports wireless mouse and keyboard;
Supports for Windows, Linux, for MAC OS and Android operation system, etc;
Plug and play, no need to install any driving program;


USB version: compatible with USB 2.0 Full/Low speed
HDMI resolution: 4K/30Hz
USB rate: Low speed( 1.5M b/s); Full speed(12Mb/s)
Support video format: 3D
Support video color format: 24/30/36 bit deep color
Support audio format: For DTS-HD/Dolby-trueHD/DTS/Dolby-AC3/DSD
Max bandwidth: 600MHz
Max baud rate: 6Gbps
Input cable distance: 8m AWG26 HDMI standard cable(4K/30HZ);
3m 2.0 HDMI standard cable(4K/30HZ)
Output cable distance: 8m AWG26 HDMI standard cable(4K/30HZ);
5m 2.0 HDMI standard cable(4K/60HZ)
USB cable length: Standard USB 2.0 cable 2m
Max working current: 900mA
Power adapter format:
Input: AC (50HZ, 60HZ) 100V-240V;
Output: DC5V/ 1.5A
Operating and Connecting:
1: Connect four cables from HDMI source device into HDMI switch input.
2: Connect one cable from HDMI source device into HDMI switch output.
3: Connect PC signal source (such as USB ports on the PC) and 'PC1-PC4'ports on the switcher with 4 USB 2.0 cable
4: Connect USB1~USB4 ports with wired or wireless USB mouse/keyboard
5: Connect 5V/ 1.5A power adapter to the HDMI switch.
Notice: Keyboard Mouse ports can be connected with keyboard and mouse, but only 1 case of keyboard and mouse at 1 time. After turning the switcher on, 'Power' light is on'HDMI IN1'light is on'PC1'light is on. 'Select' on the switcher can be pressed or '1-4' button on the remote control to switch HDMI IN1-4 and PC1-4 ports. There are two ways to switch the keyboard hotkey switching 'ctrl + ctrl + 1/2/3/4' (Double-clicking again ctrl 1-4), or'* + 1/2/3/4'. The input port is switched to when near light is on. Respective light is on when
USB1-USB4 ports are connected.
Notice: HDMI IN and PC input ports are switched simultaneously.
Package includes:
1 x IR Remote Control (Batteries not included)
1 x 5V Power adapte
1 x USB 2.0 A Male cable
1 x User Manual