Nissei DG-503MAX Digital SWR and Power Meter for Analog and Digital Radios

It has UHF Female (SO-239) in and out connectors. Minimum Power for SWR 1W. Checks your antenna SWR. Testing functions: Fwd/Rev Power, SWR ratio. Accuracy: (AVG) + / - 5%. Includes operation manual and DC 12V wire.