12V … available everywhere, and certainly at Galaxus too, a standard 2A power supply (more is better and does no harm; 1.5A is the maximum required) … The plug just has to fit
Unfortunately, we cannot offer the right replacement power supply through us, as such spare parts are usually only available through the manufacturer or service centre. I therefore recommend that you contact the manufacturer directly. Alternatively, you can also send the device in for repair (costs depend on the inspection).