Like the BP26, the BP1.5 doesn't have a voltage assigned to it, since it always plugs into an external power supply. Make sure any unit you're looking at has the MPS2 -> BP1.5 cable included, however.
As well, the warranty on a BP1.5 sold in North America will only be valid in North America, so would need to be sent back to us for warranty repairs if needed.
Thanks,
Mike