Hello @Tien,
The PosBox is compatible with popular thermal printers such as the EPSON TM-T20, the EPSON TM-T70, the EPSON TM-T88 and the Star TSP650II.
Other printers that support the ESC/POS protocol natively (not via software emulation) will often be supported too.
and
We can handle USB printer host from docker container.See Example with hw_printer_network and PosBox 8.0 as below:
docker run -d -p 1984:1984 --name wdb kozea/wdb
docker run -d -e POSTGRES_USER=odoo -e POSTGRES_PASSWORD=odoo --name db-posbox-8.0 postgres:9.5
docker run \
-p 9069:8069 \
-p 9072:8072 \
--link wdb:wdb -e WDB_SOCKET_SERVER=wdb -e WDB_NO_BROWSER_AUTO_OPEN=True \
-e ODOO_MASTER_PASS=admin \
--privileged \
-v /dev/bus/usb:/dev/bus/usb \
--name 8.0-posbox \
--link db-posbox-8.0:db \
-t itprojectsllc/install-odoo:8.0-posbox -- --load=web,hw_proxy,hw_posbox_homepage,hw_scale,hw_scanner,hw_escpos,hw_printer_network
Regards,

Email: odoo@aktivsoftware.com
Skype: kalpeshmaheshwari