Instek GVT-427B/GVT-417B - AC Millivolt Meter                                     FEATURES：   300µV Full scale sensitivity Measures frequency from 10Hz ~ 1MHz Measures from -70dB ~ +40dB in 12 ranges Dual Channel (GVT-427B) GVT-427B(2CH)            GVT-417B(1CH)     Downloadable Data Sheet        SPECIFICATIONS       Input         Voltage Range 300µV ~ 100V of Full Scale in 12 ranges         Decibel Range -70db ~ +40db in 12 ranges         Accuracy +3% of full scale         Operating Mode Channel 1 and 2 separately or simultaneously at channel 1, one channel only (GVT-417B)         Frequency Response 20Hz ~ 100kHz+3%, 10Hz ~ 1MHz+10% (reference 1 kHz)         Impedance 1MΩ, approx. 40pF       Output         Level Approx. 0.1Vrms at full scale         Distortion Less than 2%       Power Source AC 115V/230V±10%, 50/60Hz       Accessories Instruction manual x 1, Power cord x 1, Test Lead GTL-101 x 2 (GTL-101 x1 for GVT-417B)       Dimensions & Weight 142(W) × 210(H) × 235(D) mm, Approx. 3kg       Note：CE mark is only for GVT-417B