Plantronics BackBeat FIT 350 Wireless Headphones



  • DIMENSIONS: 36 x 1.39 x 6.42 inches
  • WEIGHT: 15 g
  • BLUETOOTH: Bluetooth 4.1, HFP 1.6, HSP 1.2, A2DP v1.2, AVRCP v1.4
  • LISTEN TIME: Up to 6 hours
  • TALK TIME: Up to 6 hours
  • DEEPSLEEP: Up to 6 months
  • FREQEUNCY RESPONSE: 20 Hz – 20 kHz
  • IMPEDANCE: 16 ohm
  • WIRELESS RANGE: Up to 33 ft/10 m
  • CHARGING TIME: Less than 2 hours


The Plantronics Backbeat Fit 350 are wireless loop headphones. These headphones come in black, grey and blue colors. The design of the earbuds features ear loops which not only provides a secure-fit but also maximum stability. The headphones are rechargeable and one complete charge of the headphones can provide 6 hours of play time.

In addition to this, the headphones are also sweatproof and water-resistant making them a good choice to be use during the long workout sessions. They have a waterproof rating of IPX5. They also feature effective noise isolation and provide an enjoyable bassy sound which is loud clear.

Headset overview

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Be safe
Please read the safety guide for important safety, charging, battery and regulatory information before using your new headset.

Install the app
Get the most from your headset by downloading our free app, BackBeat for iOS/Android™. With this app, you can:

  • Turn features on/off
  • Find MyHeadset
  • View the user guide

For maximum benefit, install the BackBeat app on every device paired to the headset.

Get paired

The first time you power on your headset, the pairing process begins.

  1. Power on the headset by pressing the Center button until you hear “pairing” and the LED light flashes red and blue.Plantronics-BackBeat-FIT-350-Wireless-Headphones (2)
  2. Activate Bluetooth® on your phone to search for new devices.
    • iPhone > Settings > Bluetooth > On*
    • Android > Settings > Bluetooth > On > Scan* NOTE *Menus may vary by device.
  3. Select “PLT BBFIT350 Series .”

If necessary, enter four zeros (0000) for the passcode or accept the connection. Once successfully paired, you hear “pairing successful” and the indicator light stops flashing.

Pair mode

There are 2 ways to put your headset into pair mode. Choose:

  • With the headset powered on, press and hold the Volume up (+) button and Volume down (-) button until you hear “pairing.”
  • With the headset powered off, press and hold the Center button until you hear “pairing.” NOTE You can connect up to 2 devices to your headset.

Charge and fit

The door covering the charging port is located on the left side of the inline controller. Open it with your fingernail. For best performance, fully charge your battery before use.

It takes up to 2 hours to fully charge the headphones from a completely drained battery state. While charging, the indicator light is red and turns off once charging is complete.

Quick Charge
Charge your headset for 15 minutes for up to a full hour of listening time.

For the best sound, a good seal with your ear canal is essential. Try on the three different sized eartips to find which one fits you best. You may prefer a different size eartip in each ear for the best fit. The right side eartip notch is larger than the left side eartip.Plantronics-BackBeat-FIT-350-Wireless-Headphones (3)

  1. Try it out Put the earbuds in your ears and make sure the stabilizing loop is tucked securely in your ear for stability.Plantronics-BackBeat-FIT-350-Wireless-Headphones (4) The stabilizing loop should be comfortable once it is tucked securely in your ear. Listen to a favorite song while trying out each eartip and select the one that gives you the best fit and sound.
  2. Remove the eartip To remove the eartip, pull straight out with some force.
  3. Replace the eartip Push the eartip onto the earbud tip marked with the “L” or “R” with the notch on the rubber eartip lining up with the raised plastic notch in the earbud tip.Plantronics-BackBeat-FIT-350-Wireless-Headphones (5)
  4. Clean the eartip When needed, clean the eartip with an alcohol wipe or a cotton swab dipped in isopropyl alcohol.

Wear the headset

  • There are 2 ways to use the clothing clip to stabilize your headset.
  • Attach Drape the headset cord behind your neck and attach the clip to your clothing.Plantronics-BackBeat-FIT-350-Wireless-Headphones (6)


Power on or off
To power on, press the Center button for 2 seconds until you hear “power on.” To power off, press the Center button for 4 seconds until you hear “power off.”

Adjust the volume
Tap the Volume up (+) or down (–) button.

Music and more
Listen to your music, podcasts, navigation and other streaming audio on your headset.

NOTE Functionality varies by application.

  • Play or pause audio
  • Tap the Center button.
  • Skip to next track
  • Press the Volume up (+) button for 2 seconds.
  • Play previous track
  • Press the Volume down button until you hear the confirmation tone to restart the current track. Press the button twice (each press until the confirmation tone sounds) to go to the previous track.


  • If your headset loses Bluetooth connection with your phone, it will automatically try to reconnect.
  • If your headset can’t reconnect, tap any key once or manually connect through the phone’s Bluetooth. If your headset remains out of range for more than 90 minutes, the DeepSleep mode will activate.

Answer or end a call
Tap the Center button.

Double-tap the center button to call the last number you dialed.

Mute the headset
During a conversation, press and hold the Volume up button or the Volume down button until you hear “mute on” or “mute off.” An alert repeats every 15 minutes when mute is on.

Headset Features

Voice assistant
Siri, Google Now™, Cortana Press and hold the Center button for 2 seconds until you hear the tone. Wait for the phone prompt to activate voice dialing, search, and other smartphone voice controls.

Answer calls from a second device

  • It’s easy to answer calls from two devices.
  • When on a call, you hear a ringtone notification of the incoming call from the second paired device.
  • To answer a second call from the other device, first tap the Center button to end the current call and tap the Center button again to answer the new call. If you choose to not answer the second call, it will go to voicemail.

Voice prompts
Your headset tells you about status changes. For example:

  • “Power on”
  • “Pairing successful”
  • “Phone 1 connected”
  • “No phone is connected”
  • “Mute on”

DeepSleep mode
If you leave your headphones powered on but out of range of your paired phone for 90 minutes, your headset conserves its battery power by entering into DeepSleep mode.

Once back in range with your phone, press the Center button to exit DeepSleep mode.


  • Is it good for outdoor use/rain?
    The headphones aren’t recommended to be used during heavy rains; however, they are water resistant and waterproof. This means they can handle only light rain and sweat.
  • What is the range on this Bluetooth headphones?
    The BackBeat FIT 350 wireless headphones have a Bluetooth range of up to 33 ft/10m.
  • Do the headphones come with replacement ear tips?
    Yes, the headphones come with 3 sets of ear tips. The ear tips are differently sized small, medium and large.
  • Does this set come with changeable ear bud pieces/sizes?
    Yes, they come with three differently sized ear tips.
  • Is there a feature that allows you to change songs?
    Yes, Press and hold the Plus button for 2 seconds to track forward, and the Minus button for 2 seconds to track back.
  • Are the compatible with Garmin Vivo active 3 music smartwatch?
    They are compatible with all devices that support Bluetooth.
  • Can these headphones be charged with charging pouch if bought separately?
    The headphones use a standard USB to micro-USB cable for charging.
  • Does it have a sleep mode if not being used but left on?
    Yes, the device will enter deep sleep mode to conserve battery life when left idle for a few hours and unconnected from the phone.
  • Does or does not this unit come with a microphone so I can talk on the phone while wearing them?
    Yes, they come with a built-in microphone, which can be used for attending calls.
  • Does this item stay fitted in the ears while running and jumping?
    Yes, the headphones provide a good and comfortable fit.

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