HFJ-8AD RF Millivoltmeter: 1.LCD display 2.1mV~10V voltage ... testing frequency range 4.CE approval MCH RF Millivoltmeter Product,HFJ-8AD Millivoltmeter:Features: Double diode rectifier,Low-noise deep negative ... subject to change without prior notice. MCH RF Millivoltmeter Product,HFJ-8AD RF Millivoltmeter,1000MHz frequency RF millivoltmeter