This device is as close to a scam as you can get. Revain's advertisement states that the application is not required. There are problems and go to the site. Each sentence says to install the app. . Used 3 Android devices, 2 PCs and 1 Apple iPad which could not find the device on wifi on all PCs except 1 with older software. Tried all the tips on the internet, nothing helped. The length of the wireless receiver cables should be longer because the picture will twitch and jump when moving/falling. The length might be good for a 19"/20"/22" TV, but definitely not for a 42". If you take the cable all the way and fasten it, the device will come out of the HDMI port. Resetting the device doesn't work either.
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