The one issue with my Sony A 7II is that the 28-70mm lens is slow, shooting at the equivalent of F 3.5 to 5.6. In indoor light, some lighting enhancement is desirable. And in outdoor situations where bright sun and objects create half-shaded faces and scenes, some fill-in light would be useful. Enter the Neewer® NW320 TTL LCD Display LED-Assistive Preview Focus flash Speedlite for the Sony A 7II. It fits onto the camera's hotshoe and operates with TTL (Through the Lens) logic, adjusting camera settings for the amount of light, leaving you with a nearly perfectly exposed shot, most of the time.
The Neewer NW320 is only rated at 32, which is a modestly powered unit (compare speedlites at up to 180 or more), but it is great for portraits, small groups, museum objects, plants, flowers in the shade, and so forth. The light power is great up to about 8 feet.
For the entry-level price, this unit is great for those who want to experiment with an on-camera flash before committing to a $400 one. The flash head tilts up and includes a diffuser for adjusting results.