Specifications: -Character of products Multi-tiers foldable grandstands can be used for good viewing&stability of spectators with variety type of seating and provide maximum seating capacity when extended. It can be also retracted to the wall or under the balcony for providing the multi-purpose of whole area. Especially, it was developed newly for outdoor using as well as indoor. -Character of Retractable Seating> 1. Operated from first row after another by locking mechanism which can be locked and un-locked automatically. 2. Grandstand is fixed to the floor with stopper for further stability by the load of spectators when extended. 3. Various seats with variety colours. 4. Extended&retracted automatically by the motor driven or manually.