The Macintosh Portable power adapter can be used in most voltage ranges
and can accept a square wave from a generator. The power adapter has the
following characteristics:
Input voltage: 85 to 270 VAC; 120/240 nominal
Frequency: 48 to 62 Hz; 50/60 nominal
Output current: 0.005 to 1.5 Amp maximum
Output voltage: 7.5 +/- 0.1 VDC
Operating temperature: 0 to 40 degrees centigrade (external temperature
Weight: Less than one pound (varies depending on the unit)