Ba far the best 5" and HDMI with DVR screen out there, it has very nice bright screen, the picture is clear and sharp.

Has 40 5.8G channels with auto scan and manual select with true diversity. Forks great even with included standard Pigtail antennas, for max range better swap to Patch antenna's like this ones Pagoda Patch easy takes 7km direct range

Has wide voltage input range, via XT60 connector you can connect any available battery what you got 7-28 volts (2-6S).

Has Audio! and AV in and AV out with HDMI in (1.1).

Has OSD for band channel and input battery voltage.

The minor downside is what it has control knob on a back of the screen, so you can't place is flat on ground, but that is easy fixable with a stand or 3d printet tpu pad!

Channel table(Unit:GHz):

PRODUCT DESCRIPTION

Specifications:
Screen size:5 inch
Screen type:TFT LCD screen/long life
Resolution:800x480 pixels
Aspect ratio:16:9
Brightness:800cd/m2
Video format:AUTO/NTSC/PAL
Audio:6.5MHz
Input signal:AV/HDMI
HD IN(mini HDMI):Version 1.1 digital
Output signal:AV
Input voltage range:7-28V
Power consumption:560mA12V
Working status OSD display:Yes
Recording format:AVI
Support TF card:Max 32GB micro SD card
Antenna connector:SMA
Dimension:133mmx93mmx14mm
Weight:174g
Sensitivity:-90dBm
Frequency range:5645MHz-5945MHz
Channel:40 channels(it can be customized)
One-key-search channel:Yes,click downward joystick for 3 sec.
Audio:6.5MHz

Features:

1.High brightness 800cd/m2
2.Wide input voltage range :7-28V,powered by 2S-6S battery
3.Built-in DVR,support one-key-recording
4.Built-in true diversity receiver,automatically receive best signal
5.Easy to use operating system and 5-way joystick with channel auto scan
6.With AV IN and AV OUT
7.With HD IN, support high-definition video input
8.On screen display channel,band,input voltage and working time

How to select channels:

1.Click downward joystick for 3 seconds to autoscan channels
2.Pressing left on the joystick to change channels,press right on the joystick to change band
3.Single press down joystick,it enter menu and then press left/right on the joystick to select band and channel
 

Package Including

1 * FPV FX508 Monitor with Visor
1 * Manual
1 * XT60 Power Cable
2 * Circular polarized Antenna

You can get your FX screen here: https://api.racer.lt/6yew

Patch antennas for long range: https://api.racer.lt/6ygu

There is similar screen in 7" by skyzone: https://api.racer.lt/6yjq