Panasonic KX- TC1721B Operating Instructions Manual page 8

=> Location of Controls
Base unit
LINE 2 indicator
(p. 40) Antenna (p. 3, 11)
LINE 1 Indicator
(p. 40)
Handset Hook (p. 48)
CALLER ID
Indicator (p. 29)
Charge Contacts RINGER Button (p. 21)
(p. 15)
RINGER Button (p. 21)
LOCATOR} Button
(p. 42)
IN USE/CHARGE Indicator
(p. 14)