1、Multi Device Connectivity: The sound video switcher allows simultaneous connection of up to four signal sources, such as DVD players. This reduces the hassle of frequent cable swapping, providing a convenient and uninterrupted experience. 2、Versatile Output Options: It converts multiple video signals into a single high definition multimedia interface signal for HD displays, while also offering dual video outputs. This flexibility enables you to connect to either an high definition multimedia interface capable monitoring or projector or two equipped displays. 3、Aspect Ratio Adjustment: With one touch switching, you can easily toggle between various aspect ratios including 4:3, 16:9, 16:10, and FULL. This powerful functionality ensures that you can quickly adjust the display to suit your viewing preferences. 4、Comprehensive Signal Compatibility: The 4 port AV selector switch supports a wide range of input resolutions across standard TV formats such as NTSC and PAL variations. Its robust compatibility and auto detection of input formats make it suitable for different setups and devices. 5、Desktop Controller And Easy Setup: The included desktop key controller allows for simple, one key switching between signal input channels, contributing to both ease of use and a tidy work space. The plug and play design requires no additional drivers, offering portability and flexibility. Item Type: 4 Port AV Switch Material: Aluminium Alloy Input Ports: 4 Output Ports: 1 x High Definition Multimedia Interface Input Resolution: for Detect NTSC-443, for NTSC-M, for NTSC-J, for PAL60, for PAL-H, for PAL-I, for PAL-N, for PAL-Nc, for PAL-M, for PAL-B, for PAL-D, for PAL-G Automatic: 1.0Vp-p Impedance: 75Ω High Definition Multimedia Interface Output Resolutions: 480P, 576P, 720P, 1080P Aspect Ratio Key: 4:3, 16:9, 16:10, FULL EXT Key: Switch Inputs 1, 2, 3, 4 1 x 4 Port AV Switch 1 x Adapter 1 x Supply Cord 1 x Desktop Buttons Controller 1 x Manual