1. Aluminum alloy, stainless steel material, support rod, speed measurement, energy measurement, speed energy, browsing records and viewing average values. 2. The core components are packaged in industrial grade, with stable performance and small error 3. Accurate velocity for projectiles with a velocity of 0-3000 m/s 4. Large effective sensing area, easy to use and high sensitivity 5. Strong adaptability to ambient light, can be used indoors and outdoors day and night 6. Can save 80 sets of data, you can see the average value 7. This product is made by DIY, with the purpose of simplicity, practicality, accuracy and durability 8. It is mainly used to learn and experience the high-speed data processing ability of single-chip microcomputer, which can measure the flying speed of various projectiles. Such as: table tennis, badminton, bow and arrow, physical acceleration experiment, projectile free fall experiment, nerf toy speed measurement, children's soft toys, etc. 9. Working temperature: -30 to 60 degrees celsius 10. Power supply mode: 4 x AA batteries (not included in the product) 11. Measuring range: 0-3000M/S (FPS range 30-9999) 12. Voltage: DC 6V 13. Size: 330x80x44mm 14. Weight: 436g Notice: 1. This product is infrared radiation type, the light source has been integrated in the machine, no external light source is needed; it is recommended to be used in weak light environment; the darker the ambient light, the better the machine performance. For outdoor use and under strong light conditions, a hood must be added 2. When measuring the velocity of the projectile at a higher velocity. Please take appropriate protective measures. Prevent projectiles from rebounding after hitting the machine and causing damage 3. When installing, pay attention to the marks on the left and right sides of the light bar, and the light bar with lights faces down Packing list: -1 x speedometer -1 x screwdriver -1 x English instruction manual -3 x heat shrink tube light strips -4 x pure copper rods
