Apple 540C, 520C manual Devices, Keyboard

	Specifications	I/O Devices - 7
		I/O Devices
Keyboard		Built-in keyboard with 12 function keys
		76 keys domestic, 77 keys ISO
		Two-level tilt adjustment

Trackpad

Microphone

Solid-state trackpad

Electret, omnidirectional

Output voltage of 4 mV, peak to peak