GE MAC 600 Operator's Manual page 41

Introduction
Symbol
28
Description
The flashing amber LED next to this symbol on keypad indicates you
must connect the system to AC power to recharge the battery.
The arrow on top of the battery symbol on display indicates that the
battery is charging.
The packaging of this product can be recycled.
Consult accompanying documents.
Unique Device Identification is a unique marking for identification of
the medical device.
Serial number.
Catalogue number (Part number).
MAC™ 600 2047426-001K