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Your cart is empty.Features: 1 to 999.9 meters per second projectile with accurate speed. Speed measurement, energy measurement, speed energy, browsing records and checking averages. Large effective induction area, easy to use, Mainly used to learn and experience the high-speed data processing ability of single chip microcomputer, which can measure the flight speed of various projectiles. Apply for table tennis, badminton, bow and for arrow, physical acceleration experiment, projectile fall experiment, for toy speed measurement, children's soft toys, Specifications: Material: Aluminum Size: 330x80mm/13x3.15in Type: single speed meter/bracket/ 1 set speed meter(optional) Voltage: for 6V Battery(not included): 4 AA battery(not included) Working Temperature: -30℃ - 60℃ Accuracy: test error 0.5% Measuring Range: 1-3000 for M/S(FPS 30-9000) Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Speed Meter 1x Bracket 1 Set Speed Meter