SKU:MH803
Magene H803 Heart Rate Armband
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Description
Magene H803 Heart Rate Armband – Accurate, Comfortable & ANT+/Bluetooth Ready
The Magene H803 is an optical heart rate armband built for cyclists, runners, and endurance athletes who demand real-time accuracy without the discomfort of a chest strap. At SGD 55, it delivers professional-grade heart rate monitoring — dual ANT+/Bluetooth connectivity, ±1 BPM accuracy, and 45-hour battery life — making it one of the best-value optical HRMs available today.
Magene is a leading cycling sensor manufacturer trusted by competitive cyclists and endurance athletes worldwide, known for delivering professional-grade accuracy at accessible price points.
Key Features
Accurate Real-Time Heart Rate Monitoring
The H803 uses a dual-beam photodiode array to capture heart rate variation data with ±1 BPM accuracy across a 40–220 BPM range. Real-time data is transmitted continuously so your bike computer, smartwatch, or training app always has a clean signal.
High Heart Rate Warning – Exercise Safely
Set a heart rate ceiling and the H803 will vibrate to alert you the moment you exceed it — a more immediate warning than LED indicators. Stay in your target training zone and reduce the risk of overexertion, whether you're on a long climb or pushing through a tempo run.
Adjustable Armband – Fits Arm Circumferences 19–31 cm
The Lycra elastic webbing and Velcro buckle strap make the H803 quick to put on and comfortable to wear for hours. The adjustable range of 190–310 mm accommodates arm sizes across a 40–120 kg body weight range, making it suitable for a wide range of athletes. Skin-friendly, lightweight, and washable by gentle hand wash.
Durable IML Case – Wear-Resistant & Scratch-Resistant
The monitor housing uses IML (In-Mould Labelling) construction — wear-resistant, scratch-resistant, and fade-proof. A single side button powers the device on and off with a 2-second press, keeping the interface clean and simple.
45-Hour Battery Life with Magnetic Charging
A single charge delivers 45 hours of continuous heart rate transmission — enough for multi-day tours, ultra-endurance events, or weeks of daily training without anxiety. The magnetic charging cable snaps into place on contact for hassle-free top-ups.
ANT+ & Bluetooth Dual Protocol
The H803 simultaneously broadcasts over both ANT+™ and Bluetooth, making it compatible with virtually every bike computer (Garmin, Wahoo, Magene), smartwatch, and training app (Zwift, Strava, TrainingPeaks, Garmin Connect). One device, every platform.
Which Optical Heart Rate Armband Is Right for You?
If you're looking for a reliable, no-fuss optical HRM that covers all the essentials — accurate real-time heart rate, long battery life, and universal device compatibility — the H803 at SGD 55 is an excellent choice. It's ideal for recreational cyclists, fitness enthusiasts, and budget-conscious athletes who want quality data without overspending.
If you train at a higher intensity, rely on heart rate data for structured training plans, or simply want the most accurate optical armband available, the Polar Verity Sense is worth the step up. As Polar's flagship optical HRM, it offers enhanced sensor performance and broader multi-sport recording capabilities for athletes who demand the best.
Both are available at Bikers.SG — choose the one that fits your training level and budget.
Specifications
| Detectable HR Range | 40–220 BPM |
|---|---|
| HR Accuracy | ±1 BPM |
| Wireless Protocol | ANT+™ & Bluetooth |
| Battery Life | 45 hours continuous |
| Charging Method | Magnetic charging |
| Monitor Dimensions | 44 × 31.6 × 11.2 mm |
| Monitor Weight | 12 g |
| Armband Dimensions | 370 × 25 mm |
| Armband Weight | 9 g |
| Adjustable Range | 190–310 mm (fits 19–31 cm arm circumference) |
| Armband Material | Lycra elastic webbing with Velcro buckle |
| Armband Care | Gentle hand wash |
In the Box
- Magene H803 Monitor × 1
- Lycra Elastic Armband × 1
- Magnetic Charging Cable × 1
- User Manual × 1
Fuel Your Ride — Hydration for Singapore & Southeast Asian Cyclists
In Singapore's heat and humidity — where sweat rates can exceed 1,000mg of sodium per hour — hydration is a performance factor, not an afterthought. Plain water isn't enough; it dilutes blood sodium and accelerates fatigue.
tenplus Phyto-Hydration Made for SE Asia
- 480mg sodium per serving — matched to tropical sweat rates
- Zero added sugar — control your carb intake separately through gels or food
- 175mg potassium + 40mg magnesium — muscle function and cramp prevention
- 25 calories per serving — daily-use friendly
- Plant-based Phyto formula: Panax Ginseng, Moringa, Turmeric, Green Tea, Noni & Tamarind
- Mild natural caffeine (37.5mg) from green tea — sustained focus, no jitters
- GMP-certified manufacturing in Indonesia
Designed for endurance rides in Singapore, Malaysia, Thailand, Indonesia, the Philippines, and Vietnam.
Shop tenplus Phyto-Hydration →💡 Your gear tracks the data. tenplus protects the performance behind it. Read the full tropical hydration guide →
Frequently Asked Questions
How do I charge the H803?
Connect the included USB magnetic charging cable to the H803. If charging fails, clean the charging pad on the back of the monitor and the pins on the charger with rubbing alcohol.
How long does the battery last?
The H803 delivers 45 hours or more of continuous heart rate transmission on a full charge.
Which bike computers, smartwatches, and apps are compatible?
The H803 is compatible with any device or app that supports standard Bluetooth or ANT+ peripheral protocols — including Garmin, Wahoo, Magene bike computers, and apps like Zwift, Strava, and TrainingPeaks.
Does the H803 work with Zwift?
Yes. The H803 connects to Zwift via Bluetooth as a standard heart rate peripheral. Simply open Zwift, go to the device pairing screen, and select the H803 from the heart rate sensor list.
Is the H803 sweat-proof and water-resistant?
The H803 is designed for active use and handles sweat and light moisture during exercise. The armband is washable by gentle hand wash. It is not rated for swimming or full submersion.
Can I use the H803 for running as well as cycling?
Yes. The adjustable armband and lightweight design (21 g total) make it equally suited for running, gym training, and other endurance sports — not just cycling.
How does the H803 compare to the Polar Verity Sense?
Both are optical arm-based HRMs with ANT+/Bluetooth connectivity — and both are available at Bikers.SG. The H803 at SGD 55 is the smart choice for athletes who want accurate, dependable heart rate data at great value. The Polar Verity Sense is Polar's premium optical HRM, designed for athletes who prioritise maximum sensor accuracy and advanced multi-sport features. If budget is a key consideration, the H803 delivers excellent performance. If you train seriously and want the best optical armband available, the Verity Sense is worth the investment.
