It is totally tested in the laboratory and 100% workable. Highly qualified metrology engineers carry out the check-up of every instrument at a specialized laboratory and with the help of master gages. This time depends on the complexity of the device and the workload of the laboratory. We are interested to send as soon as possible.
Please tell me if you can't pay on time, we can always deal. If there is something wrong with the device, please inform me in 5 days after receiving it.