How to use Nikon's photographic light, what buttons are on it,

First, this is just an ordinary indoor flash, not Nikon, it can be matched with many cameras.

The first key on the left is the flash test key, which means to try to see if the flash works normally after turning on the machine.

The second left receives the flash trigger button of other lights.

The third one on the left is a buzzer.

The fourth one on the left is a modeling lamp.

The knob on the right is to adjust the power.

In the lower right corner is the switch.

The hole at the lower left is used to connect the receiver of the wireless trigger.