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Bluetooth Speaker
  • Feature Icon Ultralight at just 39 grams
  • Feature Icon Distraction-free music & calls
  • Feature Icon Secure, no-bounce attachment
The world’s lightest, loudest, longest-lasting wearable bluetooth speaker

Run Free.Run Safe.The Best Way to Listen

Music sets the rhythm of your workout–from motivation to pacing, you spend a lot of time out with your tunes. Knowing this, we designed the 39g ultralight wearable speaker to give you better awareness of your surroundings while wrapping you in the rich sound experience that powers your active lifestyle.

Woman running listening to 39g

Product Attributes

Full Sound
A strikingly rich sound experience you can keep to yourself or share with a group
Music & Calls
Jam to tunes and take calls in-stride with Bluetooth® from your phone or smartwatch
Don’t let its weight fool you, 39g was built to withstand weather and hard workouts
IP64 rated for splash and rain-resistance— go ahead, get your sweat on

Additional Features

  • Premium Audio

    Premium Audio

    Powerful neodymium driver delivers rich sound & boosted bass
  • Easy Controls

    Easy Controls

    Large tactile buttons allow for easy in-stride music & call control
  • Up to 15 Hr Battery*

    Up to 15 Hr Battery*

    USB rechargeable battery
    *Depends on use
  • Safety & Comfort

    Safety & Comfort

    No-bounce attachment & distraction-free sound

Versatility & Rockability Configurable to fit your lifestyle

Magnet Clip

Slide the built-in magnetic clip off the back of the 39g and use it to securely hold the speaker in place through shirts, jackets, hoodies, fleeces, and more. Looks like magic, works like a charm.

Sport Clip

The built-in mechanical clip allows you to wear the 39g in a variety of ways like: directly on a sports bra or shirt collar, attached to a backpack, or secured to a running/hydration belt or armband.


Use the built-in magnetic clip to mount the 39g to any magnetic surface in the garage, at work or around the house.

Headphone Jack

Take advantage of the 39g’s headphone jack to de-tether your phone from your headphones while maintaining control of your sound, or for a little more privacy in settings like the gym. As a bonus, you can use the headphone jack to connect wired home speakers via Bluetooth to your phone!

As seen in:

Sound & Style39g is perfect for:

  • Running Icon


  • Cycling Icon


  • Walks Icon


  • Gym Icon


  • Office Icon


  • Home Icon


  • Shower Icon


  • Traveling Icon






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Estimated Delivery:


Get it as soon as tomorrow.

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Technical Specs


  • Output power:
    4 W
  • Drivers:
    N52 Neodymium


  • Play time:
    Up to 15 hrs (depends on use)
  • Battery capacity:
    560 mAh
  • Time to full charge:
    2.8 hrs
  • Charge cable:
    USB-C (included)

Control & Connection:

  • Bluetooth® version:
  • Touch Controls:
    Call, Track, and Volume
  • Headphone Output:
    3.5mm audio plug


  • Waterproof:
    IP67 rating

Additional Features:

  • Use as an intermediary to control non-Bluetooth home speakers from your phone
  • De-tether headphones from your phone with built-in headphone jack
  • Listen to music or take calls without needing access to your phone (Speakerphone w/ integrated mic)
  • Mechanical attachment clip
  • Slide-off magnetic attachment clip
  • Auto-power off

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