What is the range of ECM jammer in Payday 2?

What is the range of ECM jammer in Payday 2? Let's say I put it in the middle of the jewelry store's shopping room in the Jewelry Store Heist mission, how far it will reach?

Solution 1:

One Jammer will cover the entire map.

There is further discussion about the topic in the above link on the PAYDAY 2 Forums, but the people who HAVE tested it believe that it covers the entire map.

Solution 2:

The exact range of ECM is unknown, however, the range is limited and might or might not cover the whole map depending on its size. Update #12 shed some light on this question with the following.

Buffed the ECM jammer by increasing the range -- source