new and high quality OOTDTY Features: Five large-screen LCD screen display, large and clear. Use the common AA batteries, without external power supply, and the replacement of the is convenient. Press the button to count press the button again, and resume counting. The input adopts the common contact The selection of the is simple and convenient, and the counting is accurate and reliable. Maximum counting speed: 4 times/second. Resetable Seismic design effectively prevents data loss. No mechanical abrasion, reliable work, long service life. Specification: Power: 1.5V AA Resetable Counting Resetable minimum width: 0.1 second Counting highest frequency: 4HZ Operating temperature: -5~+40 C Counting minimum width: 50mS Contact maximum resistance: 1K Ohm Contact disconnection minimum resistance: 500K Ohm Dimensions: 63x37x30mm/2.48x1.46x1.18inch, wire length: 110cm Color: White&black Quantity: 1 Set Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 LCD Display Digital Electronic Counter (without 2 Microswitch _x000D_