Motorola 660AV - Manual (Page 13)

Specifications I/O Devices - 9
I/O Devices
Keyboard
Standard, extended, or adjustable keyboard connected through two
ADB ports
Maximum power draw for all ADB devices: 500 mA
Keyboard draws 25-80 mA
Mouse ADB Mouse II; mechanical tracking optical shaft or contact
encoding (low power)
Draws up to 80 mA
Microphone Optional electret, omnidirectional microphone
Microphone output voltage is 4 mV peak to peak at normal value
Mini phone plug connector