This is a 5102 full plastic counter, buttons and bracelets are all plastic.

The following is a counter of 5101

press counter: button push the ratchet wheel, perform decimal addition and counting, and are equipped with a rotation return zero device, with a maximum number of 9999, press ratio 1:1, counting speed (300 times/minute), widely used in stations, docks, points, tally, vehicles entering and leaving public places, number statistics, etc.