Type: P11-5A Magnetic Induction Digital Electronic Counter Instruction Five-digit big LCD, super low power consumption, large and clear indication Counting/Pause key (Pause) to stop counting, after 0-30 sec,LCD indication be automatically off and in standby state. the Counting/Pause key again to turn on the indication and continue to count. Use magnetic induction, easy to install and precise counting Maximum counting speed: 20 times per second Reset: through pressing the Reset buttons on board or exterior Use the common 5th battery, free from external power supply Anti-vibration, efficiently the stable and reliable system operation Free from mechanical abrasion, safe work, long lifespan Power: 1.5V-AA 5th battery Reset modes: board/exterior Counting range: 0---99999 Available ambient temperature: -5-40 Celsius Minimum counting PW: 10mS Distance within the magnetic induction: about 5-10 mm Distance out of the magnetic induction: 30mm Battery Installation: Make sure the battery is loaded before operation. First loosen two exterior screws on the external cover, remove the back cover lightly (do not break the signal line), then load one 5th battery (not included in this counter, customer should buy it by themselves, the lifespan of common 5th battery is above half year, while the battery with high performance, costing 2 Yuan, is more for more than 1 and half years, and next restore the back cover and two external screws. Colour:White Material:Plastic + Metal Size: Dimension: 64x38x38mm Hole size: 61x36 mm Package Contents: 1 x digital counter 1 x magnetic induction switch 1 x holder 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.