Rhythm24 Waterproof Armband Heart Rate Monitor graphic

Train Smart, Get Fit.

This next-generation, award-winning armband heart rate health and fitness device is highly accurate, packed with outstanding features and very comfortable to wear. Now you can ditch those chest strap devices and workout longer, in more places and in maximum comfort.


Wearing Rhythm24
  • Band Placement
    • For the most accurate readings, wear the Rhythm24 on the upper forearm, biceps, or triceps snug enough to not move on your arm, but NOT so tight that it restricts circulation.

  • Rhythm24 Band Placement
    Rhythm24 Band Placement
    • BICEP
    • TRICEP
Power On and Using LED Indicators


  • Power
    • On: Press and hold the Multi-Function Button (MFB) for 3 seconds.
    • Off: Press and hold the MFB for 5 seconds. The Center LED will illuminate RED, then shut off.
  • Battery Level

    To check the battery level: With the unit on, press and hold the MFB for 2 seconds.

    • 3 LEDs: 66-100%
    • 2 LEDs: 33-66%
    • 1 LEDs: 0-33%
Pairing with iOS/Android devices
  • The Rhythm24 will automatically enter pairing mode when powered on
  • Open Rhythm Sync app for iOS/Android (or fitness app of your choice)
  • Connect from home screen of the Rhythm Sync app
  • Connect Rhythm24 to your chosen app using BLE (Bluetooth Smart) or Ant+*
  • *Rhythm24 connection is done in the chosen app's setting, not through the phone's Bluetooth settings.


image PDF icon with link Manuals/Instructions

Available in:


Main Features
  • Patented technology for superior accuracy with all skin tones
  • Worn comfortably on your arm
  • Bluetooth® Low Energy / ANT+ Connection
  • IP68 Rated Waterproof and Dustproof
  • Specialized modes for 5 activities
  • 2 Multi-modes: Duathlon and Triathlon
  • Up to 13 hours of onboard memory
  • Battery provides up to 24 hours of use before recharging
Product Specifications
  • Specialized Modes For Specialized Activities


    The Rhythm24 offers five specialized Modes for:

    • Running
    • Cycling
    • Swimming
    • Heart Rate Only
    • Heart Rate Variability (HRV)

    It also offers two multi-modes:

    • Duathlon (Running→Cycling→Running)
    • Triathlon (Swimming→Cycling→Running)


  • 24 Hour Battery Life & Battery Life Indicator


    Extended use rechargeable battery allows you to work out for up to 24 continuous hours. With a 3 LED light battery indicator you’ll always know how much battery life you have left.

  • Up to 100 ft. Range


    Allows you to wirelessly workout up to 100 feet from your mobile device or exercise equipment.

  • Green/Yellow Optical Sensor Array


    Provides superior measurement with all skin tones, over monitors and watches that employ only green sensors.

  • No Chest Strap Required!


    Breathable, soft, stretchable armband design means great comfort and ease of use. Comes with an adjustable band.

  • On Board Memory


    Allows you to leave your mobile device behind, record workouts and upload data to your device later.

  • Waterproof & Dustproof


    Rated IP68 waterproof & dustproof construction means the same great accurate performance in both dry and wet conditions. The Rhythm24™ waterproof heart monitor can even be submerged up to 10 ft.

Device Compatibility
  • Compatible with more than 200 of the most popular fitness apps


    Stream your fitness-data in real time to any one of the hundreds of compatible iOS and Android apps, smart watches, bike and fitness equipment.

  • Compatible with both iOS and Android devices.
  • Download Our App


    Scosche's Rhythm Sync app allows for communication with the Rhythm24 Heart Rate Monitor

    Rhythm Sync App on Apple iOS App Store Rhythm Sync App on Google Play Store
In the Box
  • (1) Monitor
  • (1) Adjustable armband
  • (1) USB Charger
Product Care
  • Clean the sensor lens with a soft cloth.
  • Use a soft cloth with ONLY mild hand soap and cool water to wipe down the armband, sensors and plastic housing.
  • Use a cotton swab and ONLY rubbing alcohol to clean the charging contacts.
  • Separate the band from the monitor to be rinsed with warm water and/or hand washed with mild soap and left to air dry.
  • Sensor can be rinsed with warm water and/or washed with mild soap and dried with a soft cloth as to no scratch the sensor lenses.
  • Do not use any abrasive chemicals to clean the Scosche Rhythm24 Armband, sensors or plastic housing. This will cause permanent damage.