Yaesu Model YC-355D, frequency counter is of compact design, light weight and completely self-contained instrument, using advanced I.e. .techniques to enable counting of a wide frequency range 5 Hz to 200 MHz. Dual range system provides 8 digit measurement with MHz or kHz indications. Double-sided epoxy circuit board helps to ensure stable and accurate service for many years. Dual power supply incorporates a high efficiency "C core transformer. An added feature is the ability to operate on a wide range of AC line voltages 100/110/ 117/200/220/234V 50/60Hz, or on 12V DC with built-in DC-DC converter.