T-Wand 100 is a professional TPMS programmer. The programmer is equipped with 4 TPMS S1 sensors, which can replace 99% OE sensors 315MHz&431MHz dual frequency. T-Wand 100 is easily to use and can program up to 8 sensors at a time. No need to use other equipment to operate TPMS sensor activation, programming and relearn.Relearn is used to write the newly programmed sensor ID`s into the vehicle`s ECU for sensor recognition