27 Jul HT-X3006 Shooting Chronograph Speed Meter Ball Velocity Energy Measurement
Muzzle velocity: 2-1500 m/s (with counting function). Rate of fire: 0-3600 shoot/minute (60 shoot per second). Kinetic energy: 0-999 Joules. 1 x Speed Tester. Weight input range: 0.01g-99.9g....