Does it matter if the meters calibration is 1 point or 2 point? Would the following meter do everything I need it to do to successfully have a good grow?

Peace

eBay: Milwaukee SM802 SMART pH/EC/TDS COMBINED METER, SM 802 (item 280071899338 end time Jan-25-07 00:15:07 PST)
GodBud Reviewed by GodBud on . Meter Question Does it matter if the meters calibration is 1 point or 2 point? Would the following meter do everything I need it to do to successfully have a good grow? Peace eBay: Milwaukee SM802 SMART pH/EC/TDS COMBINED METER, SM 802 (item 280071899338 end time Jan-25-07 00:15:07 PST) Rating: 5