Features: 1. Mini Fan Motherboard 2. Suitable For Low-Voltage Brushed Motor, Built-In Battery Fan, Such As: Pocket Fan, Mini Handheld Fan, Hat Fan 3. Highly Integrated Single Chip Without Boost Solution, With 300 Series Of Low Voltage Motors 4. Mcu Boost Solution, With 300 Series Low Voltage Motors 5. Professional Installation Is Required To Avoid Product Damage. 1. Size: 17.8 x 17.8mm 2. Material: Copper + Epoxy Resin (EP) + Organic Resin + Glass Fiber Cloth Base 3. Type: Fan Motherboards 4. Substrate: Copper 5. Flame Retardant Properties: Vo Board 6. Insulation Resin: Epoxy Resin (EP) 7. Insulation Material: Organic Resin 8. Processing Technology: Electrolytic Foil 9. Insulation Layer Thickness: Thin Board 10. Reinforcement Material: Glass Fiber Cloth Base 11. Applicable Products: Pocket Fan, Mini Handheld Fan, Hat Fan 12. Color: As Shown 13. Specification: A-N3-1402 Package Contents: 10 x Fan Motherboards Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.