...
exec xautolock -time 3 -notify 60 -notifier "notify-send -u critical -t 60000 xautolock 'Screen will lock in 1 minute'" -locker "i3lock --dpms"
bindsym Mod4+q exec xautolock -locknow
...

...
bindsym Ctrl+Print exec "import -window root ~/Downloads/Screenshot$(date +%F%H:%M:%S).png"
...

1. find device

$ find /dev | grep -i jabra | grep snd /dev/snd/by-id/usb-GN_Audio_A_S_Jabra_EVOLVE_30_II_0002AD72CD6E07-00

1. find attributes

$ udevadm info -a -n /dev/snd/by-id/usb-GN_Audio_A_S_Jabra_EVOLVE_30_II_0002AD72CD6E07-00
Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1.1/3-1.1:1.0/sound/card1/controlC1'
:
    KERNEL=="controlC1"
    SUBSYSTEM=="sound"
    DRIVER==""

  looking at parent device '/devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1.1/3-1.1:1.0/sound/card1':

    KERNELS=="card1"
    SUBSYSTEMS=="sound"
    DRIVERS==""
    ATTRS{id}=="II"
    ATTRS{number}=="1"

  looking at parent device '/devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1.1/3-1.1:1.0':
    KERNELS=="3-1.1:1.0"
    SUBSYSTEMS=="usb"
    DRIVERS=="snd-usb-audio"
    ATTRS{authorized}=="1"
    ATTRS{bAlternateSetting}==" 0"
    ATTRS{bInterfaceClass}=="01"
    ATTRS{bInterfaceNumber}=="00"
    ATTRS{bInterfaceProtocol}=="00"
    ATTRS{bInterfaceSubClass}=="01"
    ATTRS{bNumEndpoints}=="00"
    ATTRS{supports_autosuspend}=="1"

  looking at parent device '/devices/pci0000:00/0000:00:14.0/usb3/3-1/3-1.1':
    KERNELS=="3-1.1"
    SUBSYSTEMS=="usb"
    DRIVERS=="usb"
    ATTRS{authorized}=="1"
    ATTRS{avoid_reset_quirk}=="0"
    ATTRS{bConfigurationValue}=="1"
    ATTRS{bDeviceClass}=="00"
    ATTRS{bDeviceProtocol}=="00"
    ATTRS{bDeviceSubClass}=="00"
    ATTRS{bMaxPacketSize0}=="8"
    ATTRS{bMaxPower}=="100mA"
    ATTRS{bNumConfigurations}=="1"
    ATTRS{bNumInterfaces}==" 4"
    ATTRS{bcdDevice}=="0203"
    ATTRS{bmAttributes}=="80"
    ATTRS{busnum}=="3"
    ATTRS{configuration}==""
    ATTRS{devnum}=="37"
    ATTRS{devpath}=="1.1"
    ATTRS{idProduct}=="0313"
    ATTRS{idVendor}=="0b0e"
    ATTRS{ltm_capable}=="no"
    ATTRS{manufacturer}=="GN Audio A/S"
    ATTRS{maxchild}=="0"
    ATTRS{product}=="Jabra EVOLVE 30 II"
    ATTRS{quirks}=="0x0"
    ATTRS{removable}=="unknown"
    ATTRS{serial}=="0002AD72CD6E07"
    ATTRS{speed}=="12"
    ATTRS{urbnum}=="97635"
    ATTRS{version}==" 2.00"

.....

- create udev rules file (/etc/udev/rules.d/90-jabra.rules) similar to the one bellow (replace ionescu with your username)

KERNEL=="controlC1", SUBSYSTEM=="sound", ACTION=="add", ATTRS{product}=="Jabra EVOLVE 30 II", RUN+="
/home/ionescu/bin/jabra_wrapper.sh"

- create /home/ionescu/bin/jabra_wrapper.sh file

#!/bin/sh

/usr/bin/nohup /bin/su ionescu -c /home/ionescu/bin/jabra.sh >/dev/null 2>&1 </dev/null &

- create /home/ionescu/bin/jabra.sh file

#!/bin/sh

PULSE_SERVER="unix:/run/user/`id -u`/pulse/native"

SINK_NAME="alsa_output.usb-GN_Audio_A_S_Jabra_EVOLVE_30_II_0002AD72CD6E07-00.analog-stereo"

SINK_LIST_CMD="pactl --server $PULSE_SERVER list sinks"

nSinks=`$SINK_LIST_CMD | grep "Name: $SINK_NAME" | wc -l`
tries=0
MAX_TRIES=10

while [ $nSinks -ne 1 -a $tries -lt $MAX_TRIES ]; do
    nSinks=`$SINK_LIST_CMD | grep "Name: $SINK_NAME" | wc -l`
    tries=$((tries+1))
    sleep 1
done

pactl --server "$PULSE_SERVER" set-default-sink alsa_output.usb-GN_Audio_A_S_Jabra_EVOLVE_30_II_0002AD72CD6E07-00
.analog-stereo

- make the two new files executable

$ chmod +x /home/ionescu/bin/jabra.sh /home/ionescu/bin/jabra_wrapper.sh

- double check and adapt to your environment (username/sink name/etc.)