Safe Box with Envelope Slot (Tabung)

matrik slotFrame Slot. Check the side of the frame with the slot is facing the rht side of the RGB LED Matrix. Install Acrylic to Frame. The sheet of black LED acrylic is insertedThe sheet of black LED acrylic is inserted and pushed through the slot on the rht side of the frame. Note: The photo is showing the matrix upside down, hence on the left side of