Guide Number: 22 (meters at ISO 100).

Auto-Thyristor Circuitry: This was a big deal at the time. The flash has its own sensor that "reads" the light reflecting off the subject and cuts the power instantly once the exposure is correct. This saves battery life and speeds up recycle times.

Dedicated Functionality: When used on compatible Minolta X-series cameras, it automatically sets the camera to its X-sync speed (usually 1/60s or 1/100s) and triggers a "flash ready" signal in the viewfinder.

Dual Auto Modes: It typically offers two "Auto" settings (usually Color-coded as Red and Blue) which correspond to specific apertures (e.g., f/4 and f/8 at ISO 100), allowing you some depth-of-field control.

Power: Uses 4 AA batteries, which makes it much easier to maintain than vintage flashes with proprietary rechargeable packs.