Thermo King has launched a new machine that produces only 65 Decibel. The new smart cool engine has a higher capacity and that makes it possible to switch to lower revs when the sound level has to drop even lower. That is being done automatically. When the trailer drives in to the city the software knows where it is, and the revs drop without any action of the driver. This way the sound production is no more than 60 dB(A), and therefor this unit has got the PIEK certificate.