Apple 180 用户手册

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页码 144
 
 Specifications
I/O Devices - 7
 
I/O Devices
 
Keyboard
 
Built-in keyboard with standard Macintosh layout
63 keys domestic; 64 keys ISO
Two-level tilt adjustment
 
Trackball
 
30 mm diameter, dual button
ADB interface
 
Microphone
 
Electret, omnidirectional
Output voltage of 4 mV, peak to peak