Sunny Health & Fitness cadence and speed sensor — 2‑in‑1 Bluetooth bike sensor, magnet‑free, up to 500‑hour battery (black)

Sunny Health & Fitness 2-in-1 Advanced Cadence/RPM + Speed Sensor is a compact Bluetooth sensor that records real-time cadence or speed for indoor and outdoor cycling and streams metrics to the free SunnyFit app.

Whether you want accurate RPM data for interval training on a stationary bike or reliable speed readings on a road bike, this magnet-free sensor converts pedal movement into actionable workout numbers. It’s engineered to be lightweight, easy to install, and switchable between Cadence and Speed modes with simple Bluetooth pairing to the SunnyFit ecosystem.

How do I set up the sensor on my bike?

Installation is designed to be tool-free and quick. Place the sensor on the supplied protective rubber mat, wrap it around the crank or chainstay, and secure it using the taut elastic bands or cable ties included with the package.

• Attach sensor to crankarm or chainstay for cadence or speed respectively
• Use protective mat to prevent frame scratches
• Secure with elastic bands or cable ties provided for a snug, rattle-free fit
• Open SunnyFit app and pair via Bluetooth for instant data streaming

What metrics will it display when connected to the SunnyFit app?

When paired, the sensor transmits live cycling metrics so you can monitor performance in real time. The app displays time, RPM/cadence, speed, distance and estimated calories, and stores sessions for trend review.

• Live RPM (cadence) and speed readings
• Elapsed time and traveled distance logging
• Estimated calorie readout in-session and session history
• Compatibility with SunnyFit content, leaderboards, and tours

How do I switch between Cadence and Speed modes?

Mode switching is handled either within the SunnyFit app or on the sensor itself with an intuitive button. Two LEDs indicate the current mode — blue for Cadence and red for Speed — so you know at a glance which metric you’re recording.

• Tap the SunnyFit app to switch modes without removing the sensor
• Press sensor button to toggle manually when needed
• LED indicators: blue = Cadence, red = Speed
• Works with both indoor trainers and outdoor bikes for flexible use

How long does the battery last and how durable is the device?

The sensor uses a power-efficient, magnet-less design that supports up to 500 hours of operation on a single battery, reducing interruptions between rides. Housed in a water-resistant chassis and paired with robust elastic bands, it’s built to withstand regular use across seasons.

• Up to 500 hours of battery life per battery
• Magnet-free internal design for compactness and reliability
• Water-resistant casing resists sweat and light moisture
• Durable elastic bands and ties included for long-term mounting

Who is this for? Cyclists who want precise, easy-to-access cadence or speed data will benefit most: indoor cyclists tracking RPM for workouts, commuters wanting accurate speed and distance, and training riders who pair real-time metrics with SunnyFit classes and scenic ride videos. If you value an unobtrusive sensor that moves between bikes and trainers, offers long battery life, and connects seamlessly to a robust app ecosystem, this Sunny Health & Fitness 2-in-1 sensor is designed for you.