These natural slate boards are more of an organiser (the original tablet, without the software issues or short battery life) they have a small shelf and six hanging hooks.
Blackboard sold but similar available
30cm x 48cm shown in spalted beech with natural slate board, shelf and key hooks.
Spalted Beech Blackboard similar available
Spalted Beech Blackboard, Shelf & Six Hooks
45.5cm x 60 cm
Spalted Beech Blackboard similar available