HDMI switcher refers to "high-definition multimedia switcher". It can easily switch multiple high-definition signal sources to the same high-definition display or projector freely, which is simply understood as a "many-to-one" display method. The user can use a single receiving display device to select any of the different signal input sources. At the same time, a display device can select the same or different output signals. The user can switch the signal source by remote control or manually. The input order of the signal source can be pre-set, and the default signal source can be intelligently selected. Intelligently skips input ports that are powered off.

What are the differences between HDMI switchers, what should I look for when buying, and the items that will affect their performance and use will be explained in the following sections, so be sure to include them.

1. Pay attention to the number of terminals for output and input
The terminals of the HDMI switcher are divided into the output port for connecting TVs and screens, and the input port for connecting input devices.
(1) Confirm the number of input terminals

Once you have decided on the number of input terminals, you must check which displays you want to put the screen of these devices on. In general use, only one output signal is usually required. Considering that there may be a need to project the picture to multiple screens at the same time, the GF-HDMI1602 developed and produced by Geffen Technology is designed to support 2 simultaneous outputs, which is convenient to use, and does not need to use a large matrix to meet the functional requirements of transmission.

(3) A device that can freely switch between output and input sources

If you don't want to press the switch on the switch frequently to change the signal source, it is recommended to choose a device with an automatic switching function. It will automatically sense the signal and display the image of the audio and video transmission device when the power is turned on. Geffen Technologies' switchers also have a manual switching mode to increase the flexibility of use.

(2) You can control the manual switching of the input source by yourself

As the name suggests, manual switching is to specify the displayed screen by the buttons on the body, so as to avoid interference during use due to the automatic switching function. However, the operation process is a little troublesome, you need to turn on the audio and video equipment, and then transfer the source to the designated connection port, and it is also recommended to confirm the relevant switching steps before purchasing, so as to avoid problems in actual operation.

3. The switching device with remote control can be operated remotely
If you usually switch the screen of different devices frequently, and don't want to go to the place where the switch is placed, it is recommended to choose a model with a built-in remote control, so that you can switch the signal source remotely by pressing a button.

4. Confirm whether 3D or 4K resolution is supported
Since HDMI itself is a terminal that outputs digital high-quality image signals, it can at least be used to deliver full HD images. However, not all switchers support 4K resolution or 3D capabilities, so if you want to watch these movies with extreme image quality, special encoding, or conference transmission screen requirements, please check the relevant specifications of the product before purchasing to avoid falling short of the expected performance. Geffen Technology's intelligent 4K switcher also supports automatic adaptation to resolution requirements for unobstructed transmission.

In addition to the switcher itself, you should also pay attention to the resolution level supported by the AV device.

5. The signal of the product with external power supply is more stable
6. Look for intelligent drive-free equipment, which is convenient for direct plug and direct use