Test the power of your Airsoft gun with the Acetech Airsoft Gun Speed Tester Shooting Chronograph. Simply shoot pellets through the metal shooting tube and immediately view your results on the display. This Airsoft chronograph measures rate of fire (rounds per minute or rounds per second) and the velocity of the pellets (feet per second). With 25 memory slots for velocity and rate of fire, you can easily view the maximum, minimum, and average specs to confirm the incredible consistency of this speed tester. The AC6000 is extremely accurate, even when shooting a fully automatic. This chronograph is compact and lightweight for convenient transport and storage. Easy to program and easy to use, this tool will enable you to keep accurate specs on your Airsoft guns and track improvements as you perform upgrades.