Which brand is better, Shangteng air tightness leak detector or Xili?

Hello, Hope. Xiamen Xili instrument air tightness tester has strong expansibility and has the functions of self-developed automatic air pressure calibration zero system and temperature compensation system. , and has the functions of saving test parameters, exporting history, supporting bar code scanning, connecting printers, supporting remote control, I/O external control and so on. , in order to meet all kinds of test conditions to the maximum extent. Tengteng air-tight leak detector is expensive and its performance is not as good as Xili's.