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**Product Specifications:**

**Brand:** AUCS

**Series:** Proud Learning Series Green Board, Proud White Board · Quality Partner

**Mathematical Equations:** sin(a+β)=cos[-(a+β)], =cos[(-a)-β], =sina·cosβ+cosa·sinβ

**Features:**

– Chalk writing surface

– Magnetic surface for attachment

– Easy to wipe clean

– Simple installation

– Solid fiber core board

– Thickened aluminum frame

**Ideal for:** Meetings, training sessions, teaching, and home learning

**Installation:** Can be mounted horizontally or vertically; removable hanging rings

**Additional Features:**

– Traceless hooks for easy hanging

– Moveable hanging rings for flexible positioning

– Activity pen holder; detachable and movable

**Material:** Made of wood fiber pressed board, resistant to deformation

**Versus:** Traditional corrugated paper boards, prone to deformation

**Moisture Resistance:** Resistant to moisture and mold, made of wood fiber material

**Two Installation Options:** Hanging rings for home and office use; corner mounting for schools and crowded places to prevent falling and ensure safety

**Note:** Images referenced in the description: Image 1 for home and office use, Image 2 for schools and training institutions.