this is the one I use. Sorry I'm not home to tell you what it says on it.
As far as accuracy you want to make sure you're using a bbt because it goes to the hundredths place which can be significant for women looking for their surge.
For reference, I ordered these on Amazon. ChoiceMMed LH & HCG tests and Mabis DMI Healthcare Basal thermometer. Its our first time tracking like this, so any tips are more than welcome. I'm just excited to get started.
I use this one which is even marketed as a basal body thermometer and doesn't say anything about vaginal use in the instructions! But it does say rectal so there ya go.