Hello, I already bought from you jammer no.20. I had before another one also form you (no.12) and it was working much better. I had to sell it and actually I am looking for something better. I have a good deal, i have somebody who can buy 2x packs of no.20, and I would like to buy no 19 just for test, to check how it works and If you give me guarantee that no 12 will work in Poland(Europe) without any problems I am gonna take also this one. If you can give me good discount I am gonna take around 3-4 packs. I would like to confirm transation by AliExpress. If you are interested please replay to me as fast as it possible ! Thank you and regards.