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Pre-Order is now closed. Click here to hear first when Karoo 2 is available.

Hammerhead Heart Rate Monitor

Hit your training goals and get more out of your Karoo 2 with real-time heart rate data. A washable chest-strap designed for fit and comfort, including all-fabric electrodes, allows for great connectivity and durability.

$64 USD
  • Adjustable, washable, elastic strap
  • Strap length: 28”-48” or 711-1219mm
  • Weight: 15 grams (pod) 28 grams (strap)
  • Connection: 2x Bluetooth channels and ANT+
  • R-R Intervals
  • 30m (90f) Water-proof
  • Electrode material: Fabric with woven silver
  • Strap connector: Side
  • Battery life: Approx. 900+ hours
  • Battery type: User-replaceable CR2032 3 volts (included)

Free standard shipping within the US and South Africa.

We gladly accept returns of unworn, unwashed, unused products. Used products are non-refundable.

Orders are processed immediately so please double-check your shipping address.

We may not have the ability to change a mistaken address before the product is dispatched.

Tracking information is sent in 3 to 5 business days.

The Silver Lining

Most heart rate monitors use polymer electrodes which are uncomfortable and degrade over time. The Hammerhead Heart Rate Monitor uses an all-fabric strap design in which silver fibers are woven into the fabric electrodes for highly sensitive and accurate ECG signal detection even on users with low skin impedance.

Connect and Go

Dual Bluetooth channels and ANT+ allow you to pair to two bluetooth devices and any number of ANT+ receivers. Pair your Karoo over ANT+ for exceptional battery life out on the road or use it with your smartwatch for running and other bluetooth indoor trainer setups.

Don’t Sweat It

A water-proof design means you don’t have to worry about sweat or water interfering with your sensor while riding. Absorbent and elastic materials allow the strap to stay in place on your chest when the sweat starts pouring. When you're done riding, easily remove the sensor casing to wash the strap and be ready for your next ride.

Ride the Distance

One of the lightest pods and straps on the market at 15 grams and 28 grams respectively. The naturally antibacterial silver electrodes reduce skin irritation while the exceptional battery life keeps you riding and reduces waste with less batteries.

    The Hammerhead Heart Rate Monitor pairs with Karoo 2 via ANT+ or Bluetooth

    Get more out of your Karoo 2

    The Hammerhead Heart Rate Monitor seamlessly pairs with your Karoo 2, transmitting real-time heart rate data through beautiful, graphical visualizations.

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