I am Fm technicians and practice this activity are more than 30 years, but as a "scrap" I have not yet seen. Initially, the unit funktiniert properly, but if you do not use for several days, (and this is not uncommon), then plans to use again, one realizes that both 12 V blocks are sucked empty. I have thrown the device after 14 days totally nerfed in the trash. And since it belongs. Unfortunately, once again saving at the wrong end. - Shame-
