The Nyrius ARIES System comes with both a transmitter and receiver module. The HDMI source (from your cable set top box, BluRay player or any other HDMI capable device) needs to be connected to the HDMI input on the receiver module.
If you want to connect more than one HDMI device to the receiver, you will need a HDMI switch as the receiver only has one HDMI input. It would have been ideal if the receiver allowed for multiple inputs.
If you plan to share HD video to multiple TV sets, you will also need to add a HDMI splitter to split the signal between your current TV and the transmitter module. Again, it would have been ideal if the receiver had some kind of HDMI pass through capability to eliminate the need for a splitter.
The receiver also has a infrared (IR) remote extender. What the IR extender does is to send signals from your existing IR remote controls and send them wirelessly to the extender on the transmitter module. This allows you to control the set top box channels using the existing remote control from another room.
The receiver module has a HDMI output port. Connect a HDMI cable from the receiver module to the HDMI port on your TV.
Both the receiver and transmitter modules need to be powered up by their respective power adapters.
Please note that the effective transmission range between the transmitter and receiver module depends a lot on the number of walls and floors between them. If there are more walls and floors in between, the range becomes shorter.
A positive point about the ARIES transmitter it that is runs on the 5.1~5.9GHz frequency so there is much less interference from other wireless devices that normally run on 2.4GHz frequency such as WiFi routers and cordless phones.
You may also want to mount the modules as high as possible to reduce interference.
On the minus side, there is a slight delay in the transmission of the audio. It is not that the audio is out of sync but whenever the ARIES is started up or when you change channels, there is a noticeable delay before the sound starts although video seems to be fine. This can be a major deterrent for some so please take note.