OTR Technology: , When the torque setting is reached, the file auto reverses 90° and then continues again in the cutting direction. OTR reduces file fatigue, as well as the possibility of file breakage. Auto Motor Start/Stop: , No footswitch required. Motor starts when the file is inserted into the canal and stops when it is withdrawn. Auto Torque Reverse: , Reduced file breakage. The file stops and reverses if the torque goes over the set torque limit. There are 11 torque settings. Auto Torque Slow Down: , Reduced file breakage. The file slows down as the torque approaches the set torque limit. Auto Apical Reverse: , The file stops and reverses when it reaches the end of the set working length. Auto Apical Slow D1own: , The file slows down as it approaches the end of the set working length, ensuring safe and accurate preparations.