The  DG-503 is a High Quality digital SWR & Watt meter for accurate measuring for Forward Power & Reflected Power & VSWR. The  DG 503 has a frequency range from 1.6 to 60 MHz (VHF) and from 125 to 525 MHz (UHF) and a power range from 0  to 200 Watt.  The  DG-503 has 1 x UHF-female input connector and 1 x UHF-female connector for the VHF band (1.6 to 60 MHz) and 1 x uhf-female input connector and 1 x uhf-female connector for the UHF band (125 - 525 MHz). The  DG-530 voltage is 12 Volt.

Features:

• Large LCD (3.5") display for easy of reading.
• Forward  / Reflected power / VSWR ratio in one push button.
• LCD backlight display.
• Convenient control layout for easy operation
• DC 12 Volt

Technical specifications:

• Frequency Range: 1.6 - 60 MHz & 125 - 525 MHz 
• Caibration point: 14MHz - 50MHz - 145MHz - 435MHz
• Impedance 50 Ohm 
• Power Range: 0  - 200W 
• Accuracy:  (+/- 5%) 
• Minimum Power for SWR: 1W  
• Insertion Loss Less than 0.1 dB 
• Testing function: Fwd/Ref Power & VSWR ratio 
• Voltage: 12 Volt
• Input Connector:  UHF-female
• Output Connector:  UHF-female
• Dimension (W/H/D) mm 140  x 84 x 122 
• Weight (Net): 750 Gram 

Package:

• 1 x  DG503 SWR/Watt meter
• 1 x 12 Volt DC wire
• 1 x User manual (English)