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J-Tech Digital ® is focused on providing high-quality products that integrate and distribute home entertainment for the residential and commercial markets. J-Tech Digital has played a major role in transforming whole-house audio, video and home theater. The JTECH-SW4K-0301-S has 3 HDMI inputs and 1 HDMI outputs which can show one of the three inputs to the HDMI output. Connect your HDMI sources to the inputs and the output connects to the display. Our series of switchers are designed to make your Audio/Video devices more convenient, more comfortable and more cost-efficient. 4K Compliant Compatible with ultra-high definition PCs and other sources and displays and adheres to the latest HDMI specification.Full support of 4K/UHD streaming services and playback devices Features: - Three HDMI inputs and one HDMI outputs - NO power adapter need *Two HDMI Inputs are needed - Supports digital Audio format: DTS-HD, True-HD, LPCM7.1, AC3, DTS and DSD audio - Auto switch on/off button. You can turn on or off auto switch function as your need. - Supports 3D Video - Supports deep color 30 bit and 36 bitSupports resolution up to 4kx2k@30HZ - Supports manual switching using the button on the device Package Includes: 1 x HDMI Switch 1 x IR Cable 1 x User Manual1 x Remote Controller Trouble Shooting Steps 1.Cannot turn on the device: make sure at least 2 HDMI inputs are connected. The device extracts power from the HDMI signal. 2. 4K does not work: Change your video source from 4K 60hz to 4K 30 HZ. 3. Remote does not work: remove the plastic isolation from where the button battery is installed