Yarn Testing Instrument with Memory Recall Facility is designed to operate at a range of 5-99999 RPM. The Yarn Testing Instrument is equipped with 4 x 1.5V Battery in the cabinet size of 190 X 72 X 37 mm. The Yarn Testing Instrument is capable of detecting at a distance range of 50-150mm [300mm Max. Depending upon ambient light]. The Yarn Testing Instrument with Memory Recall Facility operates with an accuracy of +/- [0.05% + 1 Digit].