DG-503MAX Nissei Digital SWR/WATT Meter HF VHF UHF Meter 1.6-60MHz/125-525MHz Digital DMR (TDMA)/AM/SSB Measurer Analyze HF Transceiver INTRODUCTION This SWR & Watt meter is highly accurate for measuring Forward Power, Reflected Power, and the VSWR of Analog and Digital transceivers MAIN FEATURE 1. Large LCD (3.5″) display for easy of reading. 2. Forward / Reflected power / VSWR ratio in one push button 3. Selectable to measure DMR (TDMA), AM, SSB (DG-503MAX) 4. LCD backlight display 5. Convenient control layout for easy operation 6. Packing gift box and DC 12V wire.