Type: P11-5A Magnetic Induction Digital Electronic Counter Instruction -digit big LCD, super low power consumption, and clear indication Press Counting/Pause key (Pause) to stop counting, after 0-30 sec,LCD indication will be automatically off and in standby state. Press 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 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 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 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 the battery is loaded operation. First loosen two exterior screws on the external cover, remove the back cover lightly (do not 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 durable for more than 1 and half years, and the back cover and two external screws. Colour:White Material:Plastic + Metal Size: Dimension: 64x38x38xmm 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 and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.