Apple MA970LL User Manual - Page 89
USB Specifications, FireWire Specifications, Four external FireWire ports, Data transfer speed
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Page 89 highlights
 DVD+R DL USB Specifications  Support for Universal Serial Bus (USB) 2.0 and 1.1  Seven external USB Type A ports  Two USB 2.0 ports on the front  Three USB 2.0 ports on the back  Two USB 2.0 ports on the Apple Keyboard  Each USB port (front and rear) is on a separate 480 megabit-per-second (Mbit/s) USB channel  500 milliamperes (mA) available for a total of 1.5 A on the rear and 1.0 A on the front FireWire Specifications  Support for FireWire 400 and FireWire 800  Four external FireWire ports: one FireWire 400 port (6-pin) and one FireWire 800 port (9-pin) on both the front and back  Data transfer speed:  FireWire 400: 100, 200, and 400 Mbit/s  FireWire 800: 100, 200, 400, and 800 Mbit/s Power  Output voltage: Approximately 12 V  Output power: Up to a maximum of 28 W for all 4 ports or 12 W for any one port Chapter 5 What's Under the Hood 89
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