Important
Grant read/write access to the appropriate /dev/hidraw device so the keyboard can communicate over HID.
To do that, execute these scripts :
sudo bash -c 'cat << EOF > /etc/udev/rules.d/99-ubest.rules
# UBEST ND104 Keyboard
KERNEL=="hidraw*", ATTRS{idVendor}=="6d67", ATTRS{idProduct}=="016c", MODE="0666", TAG+="uaccess"