The elevator is one of the core features of Idle Miner Tycoon.
It will collect Cash from every mine shaft until it is full or reaches the last one. The Cash it collects is stored up on the surface so the Warehouse workers can collect it.
Every upgrade increases the total transportation, load amount and loading speed. The maximum level of the elevator is 2400, but on continent mines, the maximum level is 2800. The elevator can only collect cash while going down.
You can collect Collectibles from chests which give you extra bonuses in the elevators. Your currently-selected bonus is shown in the orange circle in the top-left corner of the elevator picture, as shown here!