【USB Convenient Power Supply】 Supports power bank/computer charging, eliminating battery replacement. Stable runtime meets extended diamond setting needs.【Multi-Head Multi-Diamond Compatibility】 Includes 3 types of setting heads for round/square/irregular diamonds. Multi-head batch setting boosts efficiency by 3x.【Electric Effortless Operation】Micro motor-driven mechanism securely attaches diamonds with a light press, preventing finger fatigue and ensuring easy operation for beginners.【Precision Adhesion】Strong magnetic diamond applicators prevent slip, ensuring accurate alignment and minimizing rework. Adjustable magnetic strength available on select models.