support rod, velocity measurement, energy measure, speed energy, looking through record and view average. This productwith concise and practical, accurate and durability for the purpose. It is mainly used to learn and experience the ability of the SCM to process data at high speed, and it can measure the flying speed of various projectiles. Such as: table tennis, badminton, arrows, physical acceleration experiment, projectile free fall experiment, nerf playthings speed measurement, children's soft playthings, etc. The core components are industrial-grade package, stable performance, small error. This product for the speed of 1 to 999.9 meters per second projectile with accurate speed. The utility model has the advantages of large effective induction area, convenient use and high sensitivity. Strong adaptability to ambient light, indoor and outdoor can be used during the day and night. support rod, velocity measurement, energy measure, speed energy, looking through record and view average. This productwith concise and practical, accurate and durability for the purpose. It is mainly used to learn and experience the ability of the SCM to process data at high speed, and it can measure the flying speed of various projectiles. Such as: table tennis, badminton, arrows, physical acceleration experiment, projectile free fall experiment, nerf playthings speed measurement, children's soft playthings, etc. The core components are industrial-grade package, stable performance, small error. This product for the speed of 1 to 999.9 meters per second projectile with accurate speed. The utility model has the advantages of large effective induction area, convenient use and high sensitivity. Strong adaptability to ambient light, indoor and outdoor can be used during the day and night. Color: Black Material: plastic