Help With New ph Pen

i bought a new ph meter pen for about 25 bux this is the link: http://www.ebay.ca/itm/NEW-DIGITAL-PH-METER-FISH-MARINE-AQUARIUM-HYDROPONICS-/350295477812?pt=LH_DefaultDomain_0&hash=item518f3cce34&clk_rvr_id=306451819341

my issue is, it comes with 2 buffer solutions for calibration that i dont know how to use (manual is vague). has any1 done this before? am i suppose to mix the buffer solution with water to calibrate? and do i throw away the used buffer solution? if any1 can help it would be much appreciated! thx in advance

i'm guessing it came with pH4 and ph7 solutions?

you put your meter in the pH4 solution and manually adjust it to 4.0

rinse and dry your meter, then put it in the pH7 solution, manually adjust to 7.0

tada! your meter is calibrated.