This material works, but when it is turned off by the on / off button can not turn it back on, disconnect the plug 230v wait 3 minutes and reconnect, and it works again. Cybertek the supplier provided my contact information of the hot line gun, unfortunately if you work and you come home around 17h that it is too late. Since June 26 I have not been able to join barrel. This explains my bill. I remain still, open to suggestions.