Is it permissible to rent an apartment for a period that ends with the expiration of the rented property, or for an unspecified period with a fixed or variable annual increase?

Leasing is divided into two types: non-binding leases, which are those where no specific term is defined, such as leasing for a certain amount per day or month. This contract is valid according to some jurists, and either party may terminate it whenever they wish. And binding leases, which are those where the term is defined, such as leasing for a year. This contract is binding on both parties, and neither party may terminate it without the other's consent. For a binding lease, the term and rent must be specified, and an agreed-upon annual increase is permissible. As for a non-binding lease, the term does not need to be specified, but the rent must be defined.