The operation of the DS404 docking station couldn't be any easier. Simply put the G450 or the G460 in the dock and the system will take over from there. The DS404 automatically performs a full functional test including fresh air calibration, bump test, extensive sensor tests, alarm tests and optionally performs an automatic AutoCal calibration.After all tests have been completed the DS404 will automatically start the charging process of the detector or you may remove and begin using it. In case the detectors battery condition is insufficient to complete a test the DS404 will charge the instrument before performing the test.A good instrument gas detection maintenance program is not complete without equally good records keeping. Whether you choose to download or maintain the records on a PC or network or your preference is to leave it to the docking station, the DS404 is the right choice. The DS404 can retain as many as 2 million complete diagnostics in memory with maximum memory installed. That is over 50 years of data even if testing 100 detectors every single day!