
In this video we compare the COOSPO H9Z, Polar H10, COOSPO HW9, COROS HRM, and Apple Watch Ultra 2, and see which is the most accurate; chest strap vs armband. Plus, i'll be reviewing the COOSPO HW9 armband and COOSPO H9Z Chest strap to see if there may be a new king in town when it comes to accuracy? Let's look at the data and find out!
COOSPO H9Z Chest Strap: https://amzn.to/47UFlUJ
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VIDEO CHAPTERS:
00:00 Intro
00:43 COOSPO HW9
02:55 COOSPO H9Z
04:25 USAGE & SIMILARITIES
06:11 THE DATA
08:20 THE RESULTS
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Bike part mentions in this video

COOSPO HW9 Armband Heart Rate Monitor with HR Zones/Calories HRM Sensor for Fitness Cycling BLE5.0 ANT+ for Peloton,Zwift,Wahoo

COOSPO H9Z Rechargeable Heart Rate Monitor Chest Strap Bluetooth5.0 ANT+ HR Sensor HRM IP67Waterproof Use for Garmin wahoo Zwift
COOSPO HW9 Armband Heart Rate Monitor with HR Zones/Calories HRM Sensor for Fitness Cycling BLE5.0 ANT+ for Peloton,Zwift,Wahoo
Created: August 06, 2025The reviewer discusses the COOSPO HW9 Armband Heart Rate Monitor, highlighting its features, comfort, and battery life while noting its older sensor technology.
AI-Summary
Pros
- Comfortable and stretchy armband
- Good battery life (reportedly 35 hours)
- Includes two bands (bicep and forearm)
- Lightweight (20g with bicep armband)
- Rechargeable lithium-ion battery
- Color-changing LED indicates heart rate zones
- Pairs with Bluetooth and ANT+ technology
- Affordable with a $15 coupon on Amazon
Cons
- Uses older sensor technology (only two green LEDs and one photo detector)
- No internal storage (requires real-time pairing with a device)
Key Points
- Measures 1.6 in by 1.3 in by 0.4 in thick
- Weighs 20g with bicep armband
- Includes a magnetic charger and quick start guide
- Retails for $59 but available with a $15 coupon on Amazon

COOSPO H9Z Rechargeable Heart Rate Monitor Chest Strap Bluetooth5.0 ANT+ HR Sensor HRM IP67Waterproof Use for Garmin wahoo Zwift
Created: August 06, 2025The reviewer provides a detailed analysis of the COOSPO H9Z Rechargeable Heart Rate Monitor Chest Strap, comparing it to other heart rate monitors like the Polar H10 and the COOSPO HW9 armband. They note its accuracy, comfort, and features.
AI-Summary
Pros
- Accurate heart rate detection
- Comfortable chest strap design
- Lightweight compared to Polar H10
- Long battery life (50 hours)
- Rechargeable lithium-ion battery
- IP67 waterproof
- Pairs with Bluetooth and ANT+ technology
- Color-changing LED for heart rate zones
Cons
- No internal storage (requires real-time pairing with a device)
- Slightly slower data pickup compared to Polar H10
Key Points
- Measures 1 in wide by 2.3 in long by 0.4 in thick
- Weighs 42g with the chest strap
- Uses contact patches for heart rate detection
- Can pair simultaneously to two devices via Bluetooth
- Retails for $49 with a $15 coupon available on Amazon
