The chronographs are a device that can measure the gel balls, BB ammo, or nerf darts performance, such as the rate of fire, feet per second, velocity, joule ert,. Every professional toy blaster players need at least one kind of chronograph.

Biu Blaster can provide the best-chosen chronographs for customers, these types are super high quality, and tested by many experts to prove that they are accurate and reliable.