Apple Macintosh Performa 577 - Manual (Page 12)

Specifications I/O Devices - 7
I/O Devices
Keyboard
Standard 80-key Apple keyboard with numeric keypad; ADB
connector
Soft power-on switch
2.5 mm travel, 18 mm vertical and horizontal pitch
Two-level tilt adjustment
Mouse Apple Desktop Bus Mouse II
New, ergonomic design
Microphone Built-in electret, omnidirectional microphone
Speaker Adjustable sound control on front of bezel