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!!!!
Introduction:
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.
Feature:
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;


Specifications

:
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 KVM HDMI SWITCH 4x1
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