Type: P11-5AMagnetic Induction Digital Electronic Counter InstructionFive-digit large LCD, super low consumption and clear indicationPress the Count/Pause button (Pause) to stop counting, after 0-30 seconds, the LCD indication will automatically turn off and is in standby mode.Press the Count/Pause button again to turn on the indication and continue counting.Use magnetic induction, easy to install and accurate countingMaximum counting speed: 20 times per secondReset: by pressing the Reset buttons on the board or externallyUse the common 5th battery, free from external supplyAnti-vibration, effectively stable and reliable system operationFree from mechanical wear, safe work, long life: 1.5V-AA 5th batteryReset modes: short/externalCounting range: 0---99999Available ambient temperature: -5-40 CelsiusMinimum counting PW: 10mS Distance within magnetic induction: about 5-10mm Distance outside magnetic induction: 30mm Battery installation: Make sure the battery is charged before use. First loosen two outer screws on the outer case, remove the back cover slightly (do not break the signal cable), then charge a 5th battery (not included in this calculator, the customer should purchase it by themselves, the service life of a regular 5th battery is over half a year, while the high-performance battery, which costs 2 Yuan, is more durable for more than 1 and a half years, and restore the back cover and two outer screws. Color: White Material: Plastic + Metal Size: Dimension: 64x38x38xmm Hole size: 61x36mm Package Contents: 1 x Digital Calculator 1 x Magnetic Induction Switch 1 x Holder Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing The allowed measurement error is +/- 1-3 cm.