10 PCS Plastic Finger Counter Manual Ring Style Mini Electronic Counter, Random Colour Delivery

1. Material: plastic
2. Input signal voltage: 1.5V
3. Mini style, easy to carry and use
4. Manual design, small error
5. The way of wearing the ring does not affect other operations
6. Size: 10.5x2.5x1.5 cm
7. Weight: 12 grams
8. Counting range: 0-99999