Original Xiaomi Mijia 0.5mm Sign Pen Unboxing and Test

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Main Features:
● Switzerland imported refill: smooth writing and smear-proof, retractable and refillable
● Japan imported ink: smooth, rich black ink for effortlessly strong impression
● 0.5mm fine point draws razor-sharp, consistent lines
● 9.5mm contoured grip for superior comfort and control
● Handy retractable and rotatable design, convenient to use
● All-metal precision connection parts, 50,000 times rotation life test