[Easy to Use] Our timing air has a display panel and a large LCD screen, reading in meters per second () or feet per second (FPS), with 3 buttons and 3 indicators for easy operation, Convenient and practical [High Quality] Made of aluminum alloy, stainless steel material, support rod. Industrial grade core components, stable performance and small error. Mainly used for speed measurement, energy measurement, speed energy, viewing records and viewing averages [Precise Measurement Range] The measurement range of our chronograph is 1-2000 (5-6500 FPS), the error is very small, only 1%, making the measured data reliable and accurate, the sturdy structure can It's built to withstand the rigors of daily use without losing accuracy [Use] Accurately measure the speed of , , arrows, and . It can measure the flight speed of projectiles, such as table tennis, badminton, physical acceleration experiments, projectile free fall experiments, etc. [Advantages] This utility model has the advantages of large effective sensing area, easy use, and high sensitivity. It has strong adaptability to ambient light and can be used indoors and outdoors during the day and night.<br><br>Colour:Black Material:Aluminum alloy + stainless steel<br><br>Package Contents: 1 * Speedometer 3 * Heat shrink tube light strip 4 * Pure copper rod 1 * screwdriver 1 * English instruction manual<br><br>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.