... can be moved after freezing to measure the echo parameters.6. Flaw positioning: real-time display sound path S, horizontal X ... : (0-110)dB,0.1dB,1.0dB, 2.0dB,6.0dB Full automatic adjustment of stepsReject scope: 0-80% adjustableVertical linearity error ... , echoes, DAC curvesAverage electric noise and level: ≤10%Battery types: 6 ordinary LR14 batteries or high power lithium batteryPower supply: 220VAC ...