This unit comes equipped with a multi-function Meter, for measuring Signal Strength, RF output, AM Modulation and SWR's, a large channel display and a six-digit frequency counter (with dimmer). In addition, the DX 2547 has variable RF power output, variable talkback, Roger Beep (On/Off with LED indicator), ANL/NB functions, Clarifier for adjusting SSB RX frequency +/- 800Hz, CH9/ CH 19 selector, and a head phone jack as well as all of the standard controls: Volume, On/Off, RF Gain, Mic Gain, and Squelch. Galaxy has introduced a new filter with the DX 2547, the Galaxy Noise Filter or GNF. This function that increases the signal-to-noise ratio of weak signals, without affecting the strong signals. The GNF is intended for use in the SSB mode, and may cause distortion while in the AM mode. The units also offer a high SWR warning light, a TX indicator, Mode indicators for AM/USB/LSB, PA, Roger Beep, ANL, NB, and GNF. The Galaxy DX 2547 operates on either 13.8V DC or 110V AC @ 60Hz, and comes with Galaxy's 2-year limited warranty. 40 Ch. (11 Meter Band) AM/USB/LSB Large Meter: Signal strength, RF output, SWR, and AM mod. 6 segment frequency counter Dimmer control Variable Power Variable Talkback (ON/OFF) Roger Beep 'ON/OFF' Switch w/Indicator LED Public Address Feature ANL/NB w/Indicator LED AC/DC (3-Pin) Switched Variable Power