Does not come with instruction manual.

Origianl NISSEI DG-503 1.8-525Mhz Short Wave UV Standing Wave Meter Power Meter SWR Digital Power Meter PRODUCT DESCIPTION: DG-503 is a highly accurate DIGITAL RF POWER METER. 1. 3.5 inch LCD digital display 2. LCD backlight is convenient for users to read 3. at the same time show [forward wave] [reflected wave] [in Bobbi] 4. HF/VHF, UHF switching key 5. equipped with 13.8V DC power line Frequency range: 1.6-60MHz/125-525MHz Frequency correction point: 14 MHz/ 50MHz/ 145MHz/ 435 MHz Use function: 0-200W Test function: forward / reflective power / Bobbi Precision: (+/-5 Percent ) SWR minimum test power: 1W Loss: Impedance: 50 Omega Connector: SO239 (N-female option) Weight: 750g Size (m/m): 140x84x122 (millimeter) Accessories: use instructions, DC power line

Features & details

• Large LCD (3.5") display for easy of reading

• Forward/Reflected/VSWR ration in one push button

• Support measurement of HF/VHF/UHF frequency range. Frequency range: 1.6-60MHz/125-525MHz

• Convenient connection and control layout and for ease operation. High accuracy: (AVG) +/- 5% & Low insertion loss: < 0.3dB

• Note: Please connect the antenna or Dummy Load for the tester before conecting the power supply. Otherwise, It is easy to burn out the tester.