ITEM NAME:Z94-F Roller-Type Counter Length Measurement Measure / Roller-Type Counting I7G5 Z94-F Roller-Type Counter Length Measurement Measure / Roller-Type Counting I7G5 Widely used for counting the length of textile, printing, artificial leather and more. it has the functions of automatic repeat counting has advanced length counting function that takes plus as modulus and set correspond counting value multi-shifts counting frequencies are for choice counting alarm in advance and adjustable delay time How to use The scroll wheel rotates three times, the counter displays the number 1, and so on, every tenth. But can't count backwards. It is equipped with a zero-recovery mechanism. The zero-return method adopts the rotation mode. The number of rotations is all "0", and then the second stage is counted. Digital zero setting Rotate the knob up one week, the number is all zero colour:black Material:Plastic + metal size:Wheel diameter 106mm Package Contents: 1 * Length Measuring Machine with Counter