This chronograph is used to test the firing speed of guns, the muzzle velocity, and the firing kinetic energy. The most important function is the Bluetooth connection. You can check the shooting results on any Android phone/tablet. This is making him a most durable chronograph on the market. * Firing speed: 0-3600 bullets/min (0-60 bb/s) * Muzzle velocity: 15-800 m/s (50-2600 fps) * Firing kinetic energy: 0-500J * Precision: Testing error <1.3% * Work voltage: 3x AAA * Temperature and humidity measurement range: -0-50C, 0-100%RH * Not need additional lighting * A standard camera tripod can be installed to the instrument. The app only works on Android Download the App from the below link

https://drive.263.net/link/Euljq6xAz49XU0i/