Specification:

Voltage: DC 6V
Battery (not included): 4 * AA battery
Working Temperature: -30℃ - 60℃
Accuracy: test error ≤1%
Measuring Range: 0.1-6000J (FPS range 4-6500)
Item Size: 33.5 * 21.8 * 29.2cm / 13.1 * 8.58 * 11.5inch

Aluminum alloy, stainless steel material, support rod. Industrial-grade core components, stable performance, small error.
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.
Simple operation, large LCD screen meters per second (MPS) or feet per second (FPS) readings.
  Accurate velocity measurement for rifles, pistols, arrows and shotguns, and it can measure the flying speed of various projectiles, such as table tennis, badminton, physical acceleration experiment, projectile free fall experiment, etc.