ITEM NAME:DC-6G Digital Attenuator Program-controlled Module for HAM Radio Amplifier, SMA Description: Power supply voltage: + 5V (TYPE-C power supply) Input and output impedance: 50 ohms Output interface: SMA female Minimum attenuation step: 0.25DB Size(LxW): approx. 5.6x 4CM (without protruding SMA) height: 1.5CM.1 Piece Digital Attenuator. Output interface: SMA female. Size(LxW): approx. 5.6x 4CM (without protruding SMA) height: 1.5CM. Provide communication protocol: support both USB and TTL serial communication.