Articulate: verb to unite by or as if by means of a joint (merriam-webster​)
Articulating Borescopes: Borescopes with a small probe tip which can be bended in different directions to get better views
Four Types of articulations:
  • One-way articulation: bending only to one direction 
  • Two-way articulation: probe bends to two directions, right and left
  • Four-way articulation: probe bends to 4 directions, right and left , up and down
  • Joystick 360 all around articulation: probe is steered by a joystick to bend in 360 degree all directions. The steering can be manual mechanical or driven by an electronic motor
Picture
One-Way articulation
Two-Way Articulation
Four-Way Articulation
Joystick 360 Degree Articulation
Vividia Articulating Borescopes:                    USB type         USB/WiFi                     LCD type                 LCD/WiFi                       LCD/HDMI  
Comparison of several Vividia Articulation Borescopes Videoscopes:
Models
VA-400
VA-400W Bundle
VA-150 
VA-450
ME-610
​ME-610X
VA-980
​Output for Display
USB to PC 
USB/WiFi to PC phone
LCD, SD card
LCD, WiFi, SD card
LCD, HDMI, SD card
USB to PC
Probe (D x L)
8.5mm x 40cm
8.5mm x 40 cm
6mm x 1 m
5.5mm x 1 m
6mm x 1 m
8.5mm x 80cm
Camera Resolution
640x480
640x480
640x480
1280x720 HD
1280x720 HD
1280x720*
Focus Range
10mm to 100mm
10mm to 100mm
20mm to 50mm
10mm to 80mm
10mm to 80mm
10mm to 100mm
Probe Articulation
rigid, one-way
rigid, one-way
flexible, 2-way
flexible, 2-way
flexible, joystick 360 degree
semi-rigid, moldable
​LCD Display
NA
NA
2.7 inch
4.5 inch
3.5 inch
NA
Windows 10/8/7/XP Compatible
Yes
Yes
No
No
No
Yes
iPhone iPad compatible 
No
Yes
No
No
No
No
Android Systems
Yes**
Yes
No
Yes
No
Yes**
* The new version of VA-980 has pixels of 1280x720. The previous version (2020 or earlier) has resolution of 640x480.
** For Android devices, phone or tablet, only some Android models are compatible. Some Android models are not compatible, due to either lacking OTG function or too much customization of the  operation system.