The TDR900 comes with T-Doble software for improved data management capability. With intuitive T-Doble software, users can make and compare breaker timing measurements and create easy-to-use test plans and view test results. In addition, the said product has a high-accuracy motion recording. Patented digital rotary/linear transducer provides early diagnosis of mechanical problems and auxiliary switch and main contact timing errors. The Single-box solution provides the accuracy of a laboratory instrument with durability for field use.