Compact with bluetooth connectivity and thermal print technology the brother pj 663 is perfect for mobile printing the brother pj 663 pocket jet compact mobile printer offers a durable in the field mobile printing solution due to its thermal technology reducing any concerns over humidity and does not use toner or inks removing the risk of spillage or running out of toner because the pj663 prints in a4 its ideal for printing documents such as invoices reports and delivery notes the pj 6