It is Accurate, Easy to Read, Safe - Non Toxic, Unbreakable, Non-corrosive and can be Repositioned. Display Type: LCD - Vertical Mount. • Easy Accurate Readings.
I have tried others before I found this one. Mounts on outside of tank (which is great, as fish can't knock off). Easy to read! Accurate! Love it so much, that I have them on all 4 of my tanks! Posting pics of 3, as right now, I luckily don't have to have my hospital tank running.