User's Guide

Item Description
11 Left context key. Press to activate the feature or option that appears directly above the key.
12 Colour display with backlight.
13 Earpiece and microphone. Earpiece is active during full-duplex calls when the radio is held like a
mobile phone against the ear. Speak into the microphone during half-duplex calls when the radio is
not attached to an audio accessory and held in the hand.
14 Blue LED (indicator). Indicates a missed event such as a call, Callout or message. Also indicates
Bluetooth® status.
15 Tri-colour LED (indicator). Indicates various operational states.
16 Navi-knob. Rotate to adjust the speaker volume.
17 Side Button (A/B) (soft keys). Press to activate a programmed feature.
18 PTT (Press-to-talk) button. Press and hold to talk during half-duplex calls such as a group call.
Release to listen to other radio users.
19 Side Button (C)(soft key). Press to activate a programmed feature.
20 Digital Accessory Connector (sDAC) used to charge the battery, program the radio and attach
digital accessories.
21 Battery.
22 External Antenna Connector used with a car kit to attach an external antenna to the radio.
23 RFID tag for monitoring and auditing purposes.
24 Accessory attachment mounting points used to connect Klickfast accessories designed for
securing the radio during use.
25 Loudspeaker used during half-duplex calls when an audio accessory is not connected and the
radio is held in the hand.
2 SC21 Series hand-portable radio