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8. 

Using Your Earphones During Phone Calls

Last Number Redialing

Quickly tap on the Answer button twice and the last number that you dialed will 
be redialed.

Answering an Incoming Call

To answer an incoming call, quickly press the Answer button.

Ending a Call

To end a call, quickly press the Answer 
button, and the call will be disconnected.

Adjusting Volume

By pressing the Volume Up or Volume 
Down buttons you can increase or 
decrease the volume of the phone call.

7. 

Listening to Music

Play/Pause

Press the Power button to get music from your audio source to play or pause.

Next/Previous Song

Press and hold the Volume Up or Volume Down buttons to advance to the 
next song or go back to the previous one.

Increase/Decrease Volume

Repeatedly tap the Volume Up or Volume 
Down buttons to increase or decrease the 
volume.

NOTE:

 Music will automatically pause when 

a call is dialed out or when there is 
an incoming call. It will resume when 
the call ends.

6. 

Wearing Your Earphones

For the best sound performance and a secure, comfortable fit, be sure that 
the ear buds rest gently in your ear and drape around the back of your neck. 
Use the ear caps that works best for you.

5. 

Pairing Your Earphones With a Bluetooth Phone

-To power on your earphones, press and hold the Power button for 

approximately 3-5 seconds. Once powered on, you will hear your 
earphones audibly say "Powering ON."

-Immediately after powering on your earphones, the LED Indicator 

Light will alternately flash red and blue to indicate that your 
earphones are ready to be paired.

-Go to the Bluetooth Manager on your phone.

Search Bluetooth devices and select "Altec Sport" to start 
connecting. Once paired, the LED Indicator Light will slowly flash 
blue every few seconds.

4. 

Powering ON/Powering OFF Your Earphones:

-Press and hold the Power button for approximately 3-5 seconds to power on 

your earphones. Your earphones will automatically connect with the last 
phone they were paired with if they have previously been paired.

-Once powered on, you can press and hold the Power button again for 

approximately three seconds to power off your earphones.

NOTE:

 In order to save power, your 

earphones will automatically power 
off if left unpaired and idle for 
several minutes.

3. 

Charging: 

When charging, a red LED light will illuminate. The  light will turn blue 

when your unit is fully charged. Your earphones can take up to two 
hours to fully charge.

2. For a look at the various buttons and parts of your earphones, 

view the graphic below.

1. Make sure the following items are 

included in your package. 

12:12 PM

Bluetooth

Bluetooth

Devices

Paired

ON

Now discoverable

Altec Sport

~

3-5 Seconds

~

3 Seconds

Indicater

  Earloop

  Free Bit Ear Tips

  LED Indicator Light

  Charging Port

  /Next Track

  Power/Answer

  Volume –/Previous Track

  Microphone

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Ear Caps

USB Cable

MZX399 Waterproof 

In-Ear Earphones

EARPHONES

WATERPROOF IN-EAR

Item # MZX399

Quick Start Guide

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