Casio IT-700/70 manual Houses the memory backup lithium battery. You do not need to

7	Down Key	Moves highlighting down, scrolls screen contents downward,
		and performs other operations similar to those of the down
		arrow key on a computer keyboard.
8	IR Port	Used as then port for data communication between two Pocket
		PC Terminals, between the Pocket PC Terminal and Optical
		Communication Unit, etc.
9	Power Key	Turns power on and off*.
		* Keep depressed for about one second.
10	Numeric Keypad	Press to input numbers.
11	Fn Key	Used in combination with the 0 to 9 numeric keypad keys to
		specify functions assigned by a program.
12	Minus Key	Press to input a minus sign.
13	CLR Key	Cancels key input.
14	Decimal Point Key	Press to input a decimal point.
15	Execute Key	Press to register an input value or to execute the next step of a
		program.
16	Microphone	Used for input when using the voice recorder.
17	Speaker	Outputs alarms and other sounds.
18	Headphones Jack	For connection of commercially available earphone or
		headphones (ø 3.5mm)
19	Serial Interface	For connection of a serial cable when connecting to a digital
		mobile phone, etc.
20	Stylus	Used for Touch Panel input.
21	CompactFlash	For insertion of an optional CompactFlash Card
	Card Slot 0
22	Hand Strap Hook	For attachment of the hand strap
23	Battery Pack	Slide to proper position when opening or securing the battery
	Cover Release	pack cover.
24	Battery Pack Cover	Covers the battery pack compartment.
25	Backup Battery	Houses the memory backup lithium battery. You do not need to
	Holder	remove the hand strap to remove or insert the backup battery
		holder.
26	CompactFlash	For insertion of an optional CompactFlash Card (IT-700M30E,
	Card Slot 1	IT-70M30E)

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