Digital stroboscope has a flash rate range of 100–10,000 flashes per minute, set by a rotary knob. The selected rate is indicated by a built-in four-digit LED display. Rate accuracy is ±(0.05%+ 1 digit), controlled by a crystal time-base. Duty cycle varies from 5 to 30 minutes, depending on rate selected. Power: 115VAC.With built-in handle and 6-ft power cord. Size: 8 1/2″ x 5″ x 5″; weight: 1kg.