Product Review

Describe
easily switches three source devices and output HDMI cable will display HD resolution.the key-press-switching function is convenient for you to select the device you wanna enjoy
Such as: once the source device is turned off or plugged out, the switcher will select the next power-on source depending on the sequence automatically.

Powered from Connected Devices
No power adapter is necessary to make this switch work, as long as the connected devices supply sufficient power. HDMI cables have the capability to deliver power from connected sources.

4K Support and HDMI Features
Up to 4K resolutions at 30fps, 36-bit Deep Color, 3D, and uncompressed/compressed audio formats are some of the newer HDMI features supported on this switch.

Braided Outer Cable
Inner cables are protected from damage with the braided outer cable.

Features and Specifications
3 HDMI inputs / 1 HDMI output
Supports 12-bit Deep color per channel; maximum of 36-bits across all channels
Supports 3D devices & 4K resolutions
Supports HDCP pass-through
Supports a total TMDS throughput of 8.91Gbps max
Supports uncompressed audio such as LPCM
Supports compressed audio such as DTS Digital, Dolby Digital, DTS-HS and Dolby TrueHD

NOTE
The hdmi switcher don't need to charge, but Make sure the connected devices supply enough power to the switcher.Which could provide you high definition and good experience.
Not suitable for PS4，Apple TV ，Amazon Fire Stick and the lastest sony PS4 caused its low power consumption , but you could try other device PS4 model, maybe could work.
Once you plug-in to the devices, the switcher could recognize

Automatically, but you need to switch by pressing the select button manually