Here is another wireless HDMI transmission system that turns your iPhone or tablet into an external monitor. The Hollyland MARS X supports app monitoring through 3 iOS and Android devices. It has a transmission range of over 300ft with a clear line of sight. It has 8 frequency channels to reduce interference.
The device has a OLED display to show battery status, frequency channel, video format, and other useful information. It has collapsible antennas and a 1300mA battery. Simply download the HollyView app to your phone or tablet to use it as an external monitor for your vlogging and filmmaking needs.