A high-quality electronic digital professional pocket mini scale can be a great tool for precise measurements. Here are some key features to consider:

1. Capacity and Precision: Look for scales with a high capacity (e.g., up to 500 grams) and high precision (e.g., 0.01 grams).
2. Portability: Compact and lightweight designs are ideal for carrying around.
3. Durability: A robust build with a protective cover can enhance longevity.
4. Display: A clear, backlit LCD display makes it easy to read measurements.
5. Tare Function: Allows you to subtract the weight of the container for accurate measurement.
6. Auto-off Function: Saves battery life by turning off the scale when not in use.
7. Calibration: Ensure it comes with easy calibration features.
8. Multiple Units: Ability to measure in different units (grams, ounces, carats, grains, etc.).