Quick Reference Guide

6
2. Basic Operations
2.1 Charging the Battery

Read the Safety Information Booklet before charging.

Use the approved charger to charge the battery.

The remaining lithium-
ion battery power is limited to 30% pursuant to the new lithium battery shipment
regulation approved by the International Air Transport Association (IATA).

Use the charger to charge the battery alone or the battery attached to the radio. This method applies only to
HP36X, HP31X, and HP28X.
The LED indicator on the charger shows the charging status. For details, check the label on the bottom of the
charger.

Use the USB Type-C cable to connect the radio with battery attached to the power adapter, power bank, or PC.
The LED indicator on the radio shows the charging status, as described in the following table.
Status Description
Glows red The battery is being charged.
Flashes red rapidly The battery fails to be charged.
Glows green The battery is fully charged.
2.2 Turning On or Off the Radio
Long press the
On-Off
key.
2.3 Adjusting the Volume
Press the
Volume UP
key to increase the volume, or
Volume Down
key to decrease the volume.
2.4 Selecting a Zone

Press the preprogrammed
Zone Up
or
Zone Down
key.

Go to
Menu
>
Zone
to select a zone. This method applies only to HP36X and HP28X.
2.5 Selecting a Channel
Rotate the
Channel Selector
knob.