The XO - 1 delivered ( starting in 2007 ) uses environmental friendly materials , complies with the EU 's RoHS .
The XO - 1 uses between 0.25 and 6.5 watts in operation .
The XO - 1 delivered ( starting in 2007 ) uses environmental friendly materials , complies with the EU 's RoHS and uses between 0.25 and 6.5 watts in operation .