The device is a Standing Wave Ratio (SWR) & Power Meter of the famous Avair SX-400 model. This device is primarily used by radio amateurs and telecommunications technicians to test and adjust antenna performance and measure the output power in watts of radios in the very high frequency (VHF) and UHF frequency range (between 140 and 525 MHz). The second device is a power converter (MOHA 50-53 AMP). Condition: Clean and inspected. For sale to the highest bidder.