Armband HRM Help & Support
Armband HRM Support
Let's get your Armband HRM connected.
No tech skills needed. Follow the simple steps below and you'll be tracking your heart rate in just a few minutes.
Start Pairing → It Won't ConnectFirst-Time Setup
Connect in 6 simple steps
Do these in order. Take your time, there's no rush.
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Charge it & remove the sticker
Fully charge the armband before first use. Then remove the protective sticker from the heart rate sensor on the back of the unit. The sensor can't read through it.
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Put the armband on
Wear it on your forearm near the elbow or on your upper arm, with the sensor pressed against the skin and away from muscle bulges. Snug enough that it doesn't move, but not so tight it restricts circulation. It turns on by itself.
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Keep your arm still
Hold your arm still for about 10–15 seconds so the sensor can lock onto your heart rate. Put it on before you start exercising, not mid-workout.
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Clear any old connection
Open your phone's Settings → Bluetooth. If you see the heart monitor listed, tap it and choose "Forget This Device." This is the #1 cause of connection trouble.
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Open your fitness app
Open the app you want to use (Strava, Polar Beat, Zwift, etc.). Find its "heart rate" or "sensor" screen and let it search. Connect from inside the app, not from the phone's main Bluetooth menu. Closing other apps that use Bluetooth helps.
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Watch for the green light
While searching, the light flashes blue. Once connected, it flashes green once every minute. That means you're connected and ready to go!
The Indicator Light
What the light is telling you
The small LED on the front of the armband is your status signal. Here's what each pattern means.
Blue flashing
Searching for a connection. Open your app's sensor screen and select the armband.
Green flash once a minute
You're connected! Nothing more to do. Start training.
Green for 2 seconds at startup
Battery is full.
Red & green flashing alternately
Battery is low (under 10%). Charge it before your workout.
Solid red while charging
Charging. Turns solid green when fully charged.
No light at all
The armband isn't on. Put it on your arm with the sensor touching skin. Still nothing? Charge it.
If Something's Wrong
Troubleshooting & common fixes
Tap any question to see the simple fix.
It won't connect / my app can't find it
This is almost always your phone holding onto the connection. Do this:
- Put the armband on. It only turns on when worn. Keep your arm still for 10–15 seconds.
- Go to Settings → Bluetooth and tap "Forget" if the monitor is listed.
- Fully close your fitness app and any other apps using Bluetooth, then reopen your app.
- Connect from the app's heart rate / sensor screen, not the phone's Bluetooth menu.
- Make sure the armband is charged. Low battery can stop it from being found.
- Still stuck? If your device supports ANT+, try connecting that way.
The heart rate looks wrong or jumps around
- Check the position. Forearm near the elbow or upper arm, sensor flat against skin, away from muscle bulges.
- Clean the sensor window. Wipe the sensor on the back with a soft cloth to remove sweat, skin oil or makeup.
- Wipe off sweat. Heavy sweat can form a film between the sensor and skin. Take it off, wipe it, and put it back on.
- Give it a moment. Keep still for 10–15 seconds after putting it on before you start.
- Check your skin. Dark tattoos, dense hair or very dry skin can weaken the signal. Try your other arm.
It drops out during intense workouts
Fast arm movement (burpees, battle ropes, boxing) can make the sensor lose contact with your skin.
- Tighten the armband slightly.
- Move it up to your upper arm, where there's less movement.
It connects to my phone but not my watch
Over Bluetooth the armband connects to one thing at a time, and your phone has claimed it.
- Open Settings → Bluetooth on your phone.
- Find the monitor and tap "Forget".
- From now on, connect from your watch or app's sensor menu instead.
It turned itself off
That's normal. The armband shuts down automatically when it can't detect a heart rate for 90 seconds, for example when you take it off or the sensor slips away from your skin. Put it back on and it turns on again.
It vibrated during my workout
That's the built-in heart rate alert. The armband vibrates when your heart rate goes above 160 bpm to let you know you're entering a higher heart rate zone.
It won't charge or won't turn on
- Make sure the charging port on the bottom of the unit is completely dry.
- Check the magnetic cable is snapped onto the charging terminal. A solid red light means it's charging.
- Try a different USB wall adapter or laptop port.
- Still no light after a full charge? Contact us and we'll help.
What It Works With
Apps & devices
Works with 400+ fitness apps and most heart rate gear. Tap an app for its pairing guide.
Popular apps
Hardware devices
Want a simple app just for your armband? Scan the Heart Tool app QR code in your user manual to download it for Apple or Android.
Step-by-step guides for each app and device are on our Armband HRM Pairing page.
Power
Charging
Rechargeable battery
No coin batteries needed. A full charge lasts about 70 hours of use.
Signs it's low
Red and green lights flashing alternately when you put it on, dropped connections, or the armband not showing up in your app.
Storing it?
If you won't use it for a while, recharge it every 3 months to protect the battery.
How to charge
Make sure the charging port on the bottom of the unit is completely dry.
Snap the magnetic charging cable onto the charging terminal.
Plug the USB end into a laptop or wall adapter (not included).
The light stays red while charging and turns green when fully charged.
Keep It Working
Caring for your armband
After every use
Rinse the armband strap with clean water and let it air dry completely. Sweat left to build up can damage the sensor window over time.
Keep the sensor clean
Gently wipe the sensor window on the back with a soft cloth to remove sweat, skin oil or makeup that can block the reading.
When to contact us
The strap has lost its stretch, the sensor window is cracked or shows water inside, the battery runs down much faster than before, or it won't turn on after a full charge.
Quick Answers
Frequently asked questions
Where's the power button?
There isn't one. The armband turns on automatically when you put it on and turns off by itself about 90 seconds after you take it off.
Where should I wear it?
On your forearm near the elbow or on your upper arm. For high-intensity workouts with lots of arm movement, the upper arm usually gives the steadiest reading.
Bluetooth or ANT+, which do I use?
Both run at the same time, so you don't have to choose. Most phone apps use Bluetooth; Garmin and Wahoo gear often prefer ANT+.
Why won't it connect to my watch?
Over Bluetooth it connects to one thing at a time, and your phone probably has it. Go to Settings → Bluetooth → Forget, then connect from your watch.
How long does the battery last?
About 70 hours of use per charge. It's rechargeable with the included magnetic cable.
Is it waterproof? Can I swim with it?
It's rated IP67, so it handles sweat, rain and a quick rinse. It's not made for continuous swimming. Make sure the charging port is dry before you charge it.
Why does it vibrate?
It vibrates when your heart rate goes above 160 bpm to let you know you're entering a higher heart rate zone.
The Details
Full specifications
| Model | HW805 |
|---|---|
| Weight | 8.6 g |
| Dimensions | 40.6 × 28.6 × 7.3 mm |
| Battery | 55 mAh rechargeable |
| Battery life | ~70 hours |
| Charging | Magnetic USB cable (included), DC 5V 150mA |
| Wireless | Bluetooth 5.0 & ANT+ (both at once) |
| Water resistance | IP67 |
| Working temperature | 0°C to 45°C |
| Heart rate alert | Vibrates above 160 bpm |
| Compatible apps | 400+ fitness apps |
| In the box | Heart rate monitor with armband, magnetic charging cable, user manual |
| Warranty | 12 months |
| Intended use | Recreational fitness, not a medical device |
Warranty & Support
Your warranty
No registration required. Your coverage is automatic with your purchase.
12-month coverage
Your Armband HRM is covered for 12 months from your purchase date against hardware faults. See our Warranty & Returns policy for details.
Need a hand? We're here.
If you've worked through the steps above and still have a question, the fastest way to reach us is to message us through your order page on the store where you purchased. We'll help you get dialed in. Have your order number handy.
Prefer email? Reach our support team at support@powr-labs.com
The Powr Labs Armband HRM is intended for recreational fitness use only and is not a medical device. It is not designed to diagnose, treat, cure, or prevent any medical condition. Consult a physician before beginning any exercise program.