[Unique Design] This RCA and HDMI to HDMI switcher can easily transfer video and audio signals from 1 HDMI device or 1 RCA device to an HDMI display. Can easily switch between two input sources without needing to connect or remove devices (with manual switching). [Plug and Play] Composite/HDMI to HDMI converter, easy installation and operation. No external controller required. Simply connect your AV or HDMI devices and simply press the Shift key to change the signal in a second. It is ideal for trade show, conference room, bedroom, living room, kitchen and backyard. [Can't be used in reverse] Only AV to HDMI conversion, can't be used in reverse, can't be used as HDMI to CVBS converter. [4:3 & 16:9 Aspect Ratio Switch] Supports 4:3 or 16:9 aspect ratio HDMI output when using RCA as the input signal. Great visual experience for widescreen content or games that require 4:3 display. [Receives:] 1 AV/HDMI to HDMI converter, 1 HDMI cable, 1 USB power cable, 1 user manual (Portuguese language not guaranteed). And they come with the best after-sales service and you will always receive friendly support.