## Firmware Versions

This section shows the firmware versions currently installed in the K3 and the newest versions available in your computer's firmware folder.

#### MCU

The Microcontroller Unit on the K3 front panel board that manages the operation of the K3.

#### DSP1

The main receiver's Digital Signal Processor.

#### DSP2

The sub receiver's Digital Signal Processor, present only if the KRX3 second receiver option is installed and enabled through the K3 CONFIG menu.

#### DVR

The Digital Voice Recorder, present only if the KDVR3 Digital Voice Recorder option is installed and enabled through the K3 CONFIG menu.

#### Installed in K3

Indicates the firmware versions installed in the K3 for each of these processors. N/A indicates that the hardware option is not installed or has not been enabled through the K3 CONFIG menu.

#### Available

Indicates the most recent (highest version number) firmware files in the firmware folder. Missing indicates that the firmware folder does not contain all of the firmware files necessary to load the processor.

See Missing Files for a description of the files required for each processor.