I have to say time attendance security door, the professional level is particularly good, our company purchased a time attendance security door for our own use led to the failure of some problems, our own research for a long time did not have to study it in the end how, no way had to contact. Time attendance security door inside the company staff, let them as soon as possible to install people to help us to handle it, then to estimate their staff to have research on repair half a day, the results did not expect people will see a problem, but not how long it directly repaired, instantaneouslets our people terrified.