These stroboscopes feature a pistol-grip handle with a latching trigger and a 1/4–20 threaded Bushing for extended “hands-free” tripod mounting. High Flash energy allows measurements in bright areas. Select standard or phase—shifting models according to your application. Phase-shifting Stroboscope Stroboscope shifts in .1&Deg; increments — view different parts of moving machinery with higher resolution and accuracy. Adjust readings by as little as 0.01 FPM. Store and recall nine full Flash rate settings in nonvolatile memory—unit remembers last setting before shutoff. Set Stroboscope for internal mode or external mode (input signal from TTL to 24 V). external mode features two delay functions—phase angle delay and time delay with resolution to 0.1&Deg; and 0.00001 seconds. Whats included: a 6-ft (1.8-M) power cord (115 VAC models include plug only) (115/230 models include battery recharger), and an nist-traceable calibration report supplied by the manufacturer. Phase-shifting Stroboscope kits include: a battery recharger/AC power supply that allows continuous operation, a Spare lamp, and a carrying case. Phase shifting models let you use your stroboscopes continuously view different parts of moving machinery.