Power supply: 1.5V ,AA No.5 battery Counting range: -99999 cycles Maximum counting frequency: 20Hz Minimum counting pulse width: 2ms Magnet induction approach distance:Approximately 5-15mm Magnet induction distance: equal35mm Reset mode: panel R / external terminal Minimum clear pulse width: 0.1 second Ambient temperature: - 5-40 note:As shown above, some accessories may have color difference during delivery, which does not affect the use Colour:White Material:Metal + Plastic Package Contents: 1 x Electronic Counter set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.