The main features of Presidential system are:
The President who is directly elected by the citizens for a fixed tenure is both, Head of State and Head of Government.
Thus, there is only one executive.
The Legislature is also directly elected. Members of the executive are not permitted to belong to the legislature.
There exists a separation of legislative and executive powers as well as a system of checks and balances for e.g.
The legislature can impeach the President while the President, can exercise the ‘Veto Power’ to reject any law passed by the Legislature.
The President can continue in office irrespective of whether or not he/she enjoys majority support in the Legislature.