... 100 Hz, interval time between groups is 5 secDense5 to 100 HzDistant-denseOne-fifth of ... -dense5 secondsDense10 secondsContinuous15 secondsPower source6 standard 1.5 volt C batteries, AC adapterSize, color, weight10.25" x ... 7" x 2.5", beige, 1.9 lbs. Main Features:♦ ... in 1~100 Hz, break-wave time is 5 seconds, continuous ♦ machine Dimensions :260 x 190 ...