What the Pairing Light Is Telling You
← Back to the full Chest HRM help & support guide
The small white logo light on the Powr Labs Chest HRM is its only status signal, and it flashes during pairing rather than the whole workout. Here is what each pattern means and what to do about it.
The three light patterns
The small white light is your status signal. Here's what each pattern means.
Flashes ~20 seconds, then goes off
You're connected! The light turning off is completely normal. Nothing more to do — start training.
Goes off sooner than 20 seconds
The connection dropped. Try connecting again from your app, and make sure no other device is already using the monitor.
No light at all
The monitor isn't awake. Wet the pads and put the strap on your skin. If there's still no light, it's time for a fresh battery (see below).
Why the light turns off after 20 seconds
The light is there to confirm a connection, not to show that the monitor is running. Turning it off after about 20 seconds saves the CR2032 battery, which is how a single coin cell lasts 300+ hours of training. If your app or device is still showing heart rate, you are connected.
Before you blame the light: the pre-pair routine
The light only comes on when the sensor is awake, and it only wakes up on skin contact with wet electrodes. These six steps are the same ones on the full support page:
The one rule that fixes most problems: Put the strap on your body before you try to connect. The monitor only wakes up when it touches your skin. If it's sitting on a table, your phone can't find it.
Do these in order. Take your time — there's no rush.
Wet the two pads
On the back of the strap are two textured pads. Splash a little water on them. This is the most important step for an accurate reading — do it every single time.
Clip on the sensor
Snap the small sensor button onto the strap. The little "L" mark should point to your left side.
Put the strap on
Wear it around your chest, just below your chest muscles. Tighten until snug but comfortable, with the wet pads flat against your skin.
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.
Open your fitness app
Open the app you want to use (Strava, Polar Beat, Elite HRV, 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.
Watch for the white light
When it connects, a white light flashes for about 20 seconds, then turns off. That's normal — it means you're connected and ready to go!
One device at a time. The monitor can only talk to one app or device at once. If your phone grabbed it, your watch or app won't connect until you "Forget" it on the phone first.