Hdmi WiFi Dongle Miracast

This small key Hdmi represents an inexpensive solution to connect a tablet devoid of Hdmi output to a TV or projector screen. I mainly use the mirror function, which works well with little latency still pictures (no video or fast animation). My Nexus 7 tablet is a 2013 model, so support Miracast protocol.
The EzCast application, free of charge, is required to connect the tablet and the key on the software side.

Benefits of this key:
Low prices
External WiFi antenna derived from the power Usb cable in the form of a round plate.
Wifi Internet routing can
Do not heat excessively after several hours of use

No major disadvantages in the use I make of (Hdmi to mirror projector and screens for teaching)

Once the initial setup done (about 15 minutes), the start of the sessions is fast:
Connect the key Hdmi, and feed with the USB cable
Start Ezcast on the tablet
Enable Mirror mode in the menu
In the display settings of the tablet, enable wireless display, then turn the key in the list.

I recommend this device to view documents via wireless projector or large screen (powerpoint, photos, etc.).
I have not tested it on video.