What glucometer do I buy?

Hi, I'm from Argentina.I am about to buy a glucometer Which of these do you recommend?
- Acu Chek Guide
- Acu Chek Active
- Acu Chek Perform
Is Guide the newest, right?Is it more precise?Its operation, how?What most prioritize is precision.
No matter the glucometer price or reactive strips, since social security gives me everything.
They do not recommend another than one of these, since there are not too many brands to my country (Freestyle and the occasional, and I come from that same brand)

What do you think, friends?Thank you :)

@"Valeria Gailard", look at the instructions of the 3. Choose the one with less Mard.

@Solaria What is the MRD?I looked for it in the manual and I did not find it

@"Valeria Gailard"

It is a parameter to measure the precision.It is something like the relative average error.MRD are the acronym in English of Mean Absolute Relative Difference (Mard)

You have to search the Internet comparative studies or on the producer page sometimes they provide it

Link

all the best