A RRIF is an investment plan, established in accordance with Government of Canada requirements, into which you can transfer registered funds (usually your RRSP) without tax liability to establish a source of retirement income.
Some RRIFs are similar to continuing an RRSP beyond age 71, with the exception that you must take some taxable income from the RRIF. You can choose any payment level, as long as the total each year is at least equal to the minimum annual amount. There is no maximum payment level.