Mijia sign pen, making your writing more smoothly and freely.
PREMEC Switzerland imported refill, smooth writing, retractable and replaceable.
0.5mm high precision tungsten carbide ball beads, writing flowing and smooth lines.
Aluminum alloy penholder with 0.95mm diameter, comfortable to hold and control.
Fashionable and simple, suitable for business persons, teachers, students, etc.
Compatible with Xiaomi air purifier 1 & air purifier 2
3 kins of strainer in total.
Resisting particulate matter and absorbing peculiar smell and other harmful substance effectively.
Easy to apply it to your Xiaomi air purifier 1 or air purifier