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Small black wireless cycling sensor with handlebar mount, 8.8 grams

Magene

Magene S3+ Activity Tracker 8.8g 500h IP54

SKU CH-PWTN-6TTMF

Wireless speed or cadence sensor for cycling, 8.8 g with 500-hour battery and IP54 rating

  • NameMagene S3+
  • Features500 hours, buttons, IP54, true
  • SpecificationBlack, Bluetooth, Handlebar Mount, IP54, buttons, true, S3+
  • Power Sourcelithium_manganese_dioxide, lithium_metal
  • Battery Life500 hours
  • Operating EnvironmentIP54
  • Ultra-light 8.8 g design adds negligible mass to the bike
  • 500-hour battery life supports months of training between changes
  • IP54 rating protects against dust and splashing water
  • Dual Bluetooth and ANT+ connectivity pairs with apps and bike computers
  • Single sensor switches between speed and cadence modes

Magene S3+ Activity Tracker

The Magene S3+ is a lightweight cycling sensor that mounts on the handlebar and weighs only 8.8 grams. It is built for indoor and outdoor riders who want wireless speed or cadence data without adding bulk. The unit ships new with a pre-installed lithium battery and an insulating sheet that must be removed before the first ride. Cyclists who need simultaneous speed and cadence readings cannot achieve that with a single sensor.

500-hour battery life and IP54 rating

A single lithium-manganese-dioxide cell delivers up to 500 hours of active use before replacement is needed. The IP54-rated enclosure resists dust ingress and water splashes, so the sensor survives wet roads and sweaty trainer sessions. The device enters a sleep state after one minute of inactivity to conserve power and wakes automatically when motion resumes. Riders who expect multi-season longevity without battery swaps may find the runtime limiting.

Bluetooth and ANT+ connectivity for bike computers

The S3+ pairs with one Bluetooth app or device at a time, while ANT+ allows simultaneous connections to multiple displays such as Onelap, Wahoo Fitness or Zwift. Pairing must be initiated inside the chosen app; the phone system Bluetooth menu will not detect the sensor. One sensor operates in either speed or cadence mode, so a second unit is required for dual metrics. Builders who want a single sensor to broadcast both channels cannot use this model.

Highlights

  • Ultra-light 8.8 g design adds negligible mass to the bike
  • 500-hour battery life supports months of training between changes
  • IP54 rating protects against dust and splashing water
  • Dual Bluetooth and ANT+ connectivity pairs with apps and bike computers
  • Single sensor switches between speed and cadence modes

Specifications

BrandAdventure Labs
NameMagene S3+
ModelS3+
Part NumberS3+
Features500 hours, buttons, IP54, true
SpecificationBlack, Bluetooth, Handlebar Mount, IP54, buttons, true, S3+
Power Sourcelithium_manganese_dioxide, lithium_metal
Battery Life500 hours
Operating EnvironmentIP54
Weight8.8 grams

Questions about this item

Will the Magene S3+ pair with my existing bike computer that uses ANT+?

The sensor broadcasts over ANT+ and can connect to multiple ANT+ devices at the same time, so it will work with compatible bike computers and trainers.

How do I confirm the sensor is transmitting after I mount it?

Wake the sensor by moving the wheel or crank; the LED will flash to show it is broadcasting, then pair it in your cycling app — not the phone's Bluetooth menu — to see live RPM data.

Does the box include mounts for both speed and cadence positions, or do I need extra parts?

The package supplies the sensor with a pre-installed lithium-manganese-dioxide battery and a handlebar mount; a second sensor is required if you want simultaneous speed and cadence readings.

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