On Jonathan Higg's hands is the AC6000 Chrono from Acetech. This can measure 90fps to 1,200fps and an ROF Range of 100 to 6000 RPM. As for the read out, it can be clearly red with the 128x128 pixel OLED screen. The chrono is powered by 4 AAA batteries and has a thread at the bottom for tripod mounts. Watch the Airsoftology video below to learn more: