The counter can be used as a counter to count the number of objects and batches in a single batch, or as a length gauge. It is widely used in chemical, machinery, industry and other industries. It can be connected with encoder, length counting wheel, proximity switch, photoelectric switch, optical sensor, sensor, capacitance switch, etc. The input and output are optically isolated. The alarm value can be set. 6-digit LED display. Material: plastic color: black Package Contents: 6 x counter 12 x bracket 6 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.