Originally Posted by Douglas.Curtis
Jellas. $16 off amazon.
It comes with 4 and 7 calibration powder packets for mixing your own calibration solution. Drifts about .2 points in around 6 months time. If you get a bad one, the company will ship you a new one with great customer service.
Seems legit, great price point.
I use drops and even if I get a Jellas I will confirm
with the drops from time to time.