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8

6

5

Using the Speaker Microphone with Zello

7

STATUS LED MESSAGES

The meanings of the various status LED messages shown by the speaker microphone are 

shown on the following table: 

Installing the Zello App

To get the Zello app on your phone, install Zello from your Zello@Work network, or download the app 

from the Google Play store or Apple App Store.

Setting up Zello (Android)

1. Make sure that your phone's Bluetooth radio is enabled, and that the 

speaker microphone is powered on and that the microphone and 

phone are connected to each other.

2. Open Zello and go to Menu > Options > Under the Hood.

3. Under "Bluetooth PTT Control," choose "PTT-600". You should see 

a popup indicating the device control has been activated. If you don't 

see it, you may need to power cycle the speaker microphone and 

repeat this step.

4. Open the Talk screen in Zello (the screen with a big round button).  

In the bottom-left corner of the screen, tap-hold and slide to the 

Bluetooth icon to activate the speaker microphone  in Zello.

Setting up Zello (iOS)

1. Make sure that your phone's Bluetooth radio is enabled, and that the 

speaker microphone is powered on and that the microphone and 

phone are connected to each other.

2. Open Zello and go to: Settings > PTT Button > Wireless Zello Button.

3. Make sure that the “Wireless Button Service” is turned on by sliding 

the button to the right.

4. Press and hold the PTT button on the BTH-600-ZU/ZA.

5. Select “PTT-Z” from the list of PTT devices shown on the screen.

6. Open the Talk screen in Zello (the screen with a big round button). 

Pressing the PTT button the Push-to-Talk device should now cause Zello 

to transmit.

OPTIONAL EAPRHONES

Although the BTH-600-ZU/ZA has a built-in speaker for listening to received calls, 

some users may prefer to use a listen only earphone for enhanced privacy.  

The accessory jack on the speaker microphone will accept any mono 

earphone with a 3.5 mm audio plug.  

When an earphone is used, the 

front-firing speaker is disabled.

 

PRYME EH-1389SC model shown.  

 

Earphone sold separately.

PRYME makes a variety of listen-only earphones in 

different styles that will work with the BTH-600.

SPECIFICATIONS

Once setup, you will be able to use the speaker microphone with the Zello app, even if Zello is 

running the background.

-To activate Zello’s push-to-talk feature, press and hold the PTT button on the speaker microphone.

-When Zello is transmitting a call, audio will be picked up by the BTH-600-ZU/ZA’s built-in 

microphone.

-Incoming calls received by Zello will be heard over the BTH-600-ZU/ZA’s built-in speaker or through 

the optional earphone if you are using one.

Making and Receiving Phone Calls

You can also use the speaker microphone to make and receive phone calls.

-You can initiate a phone call by using the Phone Dialer app in the phone.

-Phone audio will be routed to the BTH-600-ZU/ZA’s built-in microphone and speaker (or earphone, 

if you are using one).

-To answer an incoming call, press the Phone button on the speaker microphone.

-While on a call, you can press the Phone button on the speaker microphone to hang up the phone 

and end the call.

LED INDICATION

Constant Red (while plugged into charger)
No indication (while plugged into charger)
Flashes red-blue-red-blue repeatedly
Two blue flashes every two seconds
Three blue flashes every two seconds
Constant red with one blue flash every two seconds
No indication

MEANING

Charge mode
Charging is finished
Pairing mode
Speaker microphone  is powered on but not paired
Speaker Microphone is powered and paired
PTT is pressed
Speaker microphone is powered off

SUPPORT AND WARRANTY

PRYME Radio Products warrants this product against defects in materials or workmanship for a 

period of one year from the date of retail purchase. PRYME will repair or replace a defective unit, 

at our option, without charge for parts or labor. The limited warranty is extended only to the 

original purchaser and is valid only to consumers in the United States and Canada. It does not 

cover damage or failure caused by or attributable to Acts of God, abuse, misuse, improper or 

abnormal usage, faulty installation, improper maintenance, lightning, or other incidences of 

excessive voltage, or any tampering or repairs by other than a PRYME authorized repair facility. It 

does not cover replacement of consumable parts, transportation costs, or damage in transit.

Repair or replacement under the terms of this warranty does not extend the terms of this 

warranty. This warranty can only be modified by an officer of PRYME Radio Products, and then 

only in writing. Should this product prove defective in workmanship or material, the consumer’s 

sole remedies shall be such repair or replacement as provided by the terms of this warranty. 

Under no circumstances shall PRYME Radio Products be liable for any loss or damage, direct, 

consequential, or incidental, arising out of the use of or inability to use this product. Some states 

do not allow limitations on how long an implied warranty lasts or the exclusions or limitations of 

incidental or consequential damages, so the above limitations or exclusions may not apply to 

you. This warranty gives you specific legal rights. You may also have other rights, which may vary, 

from state to state.

For support or warranty service on your PRYME product, contact us at 1-800-666-2654 or visit us 

on the web at www.PRYME.com.

COPYRIGHT AND TRADEMARK INFO

© 2015 PRYME Radio Products, Brea CA.  All rights reserved.

PRYME® and PRYMEBLU® are trademarks owned by PRYME Radio Products, Brea CA. 

Android is a trademark of Google Inc.

Apple is a trademark of Apple Inc.

iOS is a trademark of Cisco Systems and is used by Apple Inc. under license. 

All other product or service names are the property of their respective owners.

DISCLAIMER:

 The Bluetooth wireless link used by PRYMEBLU products is an open 

standard, unsecured technology. As such, it is not recommended for first-responder or 

other mission critical users.

Bluetooth Version:

Speaker Output: 

Receiver Sensitivity: 

Power Class: 

Range: 

Display: 

Bluetooth Profile: 

Operating Voltage: 

Battery Capacity: 

Operating Time (Standby) 

Operating Time (Typical) 

Operating Time (Continuous Talk) 

Push-to-Talk Function: 

Operating Temperature: 

v2.1+EDR, BTLE

1 watt

-82 dBm (typ.)

Bluetooth class 2

10 meters 

Blue, Red, and Green

HFP,HSP,SPP Profile

5 VDC

1,020 mAH

> 30 days

> 80 hours

> 40 hours

Built-in

-70°F to +120°F (approx.)

Model

EH-389SC

EH-389XC

EH-1289SC

EH-1289XC

EH-1389SC

EH-1389XC

EH-1399X

EH-GH89-SC

Model

Rubber Ear Hook

Rubber Ear Hook

Plastic D-Ring

Plastic D-Ring

Acoustic Tube

Acoustic Tube

Acoustic Tube

G-Hook (swivel)

Cable Length/Type

15” Coiled

25” Coiled

15” Coiled

25” Coiled

15” Coiled

30” Straight

30” Straight

10” Coiled

Connector

3.5mm right angle

3.5mm right angle

3.5mm right angle

3.5mm right angle

3.5mm right angle

3.5mm right angle

3.5mm right straight

3.5mm right angle

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