Features Easy to use: press the pause switch (POWER) for one second to stop the counting, save the data and switch to the shut-off state. Press the pause switch again for one minute to turn on the screen display and continue counting. FAST COUNTING SPEED: Plate mounted mounting screws have a maximum counting speed of 20 times per second, 1200 times per minute. When the magnet is detected, the OK indicator will be displayed on the screen. Accurate and comfortable: this counter with magnetic induction, easy and convenient installation, brings accurate counting. Easy battery replacement: when using ordinary AA batteries (not included), no external power supply is required, and the battery is easy to replace, very convenient. SIX DIGIT CLEAR DISPLAY: Six digit large screen LCD display, extremely low power consumption, long battery life, large and clear display. Specification: Item Type:Digital Counter Material: ABS Battery model: 1 x 1.5V AA battery (not included). Counting range: 0-999999. Highest counting frequency: 20 Hz. Minimum counting pulse width: 2MS Proximity distance of magnetic induction: approx. 10 ~ 15 mm / 0.39 ~ 0.59 inches. Magnetic induction distance: ≥ approx. 35 mm / 1.38 inches. Delete minimum pulse width: 1S. Ambient temperature: -5°C ~ 40°C. Dimensions: approx. 68 x 30 x 45 mm / 2.68 x 1.18 x 1.77 inches. Hole size: approx. 61 x 35 mm / 2.4 x 1.38 inches. (The size may be a certain error due to manual measurement) Function: SEISMICALLY SAFE AND DURABLE: adopt a seismically safe design, effectively ensure the stable and reliable operation of the system, no mechanical wear with long service life Package list: 1 x counter. 1 x induction switch with magnetic control. 1 x magnet. 1 x holder Package List 1 x Counter 1 x Magnetic Control Induction Switch 1 x Magnet 1 x Bracket