Tix II does not ship with a power supply. To keep compliance costs and requirements down it is made to be completely USB powered only.
Tix II is powered via a almost any USB power supply. This can be a PC or laptop, an old USB phone charger, or to be able to power anywhere – a USB power bank. Almost any Power supply with a USB style output will power the Tix II. It takes 5v and approximately 425ma depending on the brightness of the display, colours and time currently being displayed.