---
title: LED Indicator Patterns
description: NeckCare sensor, LED indicator patterns, device status lights, Bluetooth indicator, charging status LED, medical device indicators, error alerts
---

[Skip to content](https://help.neckcare.com/led-indicator-patterns#main-content)

![NeckCare Logo](https://help.neckcare.com/hs-fs/hubfs/NeckCare%20Logo_big%20(1)-1.png?height=20&name=NeckCare%20Logo_big%20(1)-1.png)

Open main navigation

Close main navigation

- [Request Support](mailto:support@neckcare.com)

[Request Support](mailto:support@neckcare.com)

 We're here to help...

- There are no suggestions because the search field is empty.

1. [Help Center](https://help.neckcare.com/?hsLang=en)
2. [Hardware & Device](https://help.neckcare.com/hardware-device?hsLang=en)

# LED Indicator Patterns

## This section explains the LED indicator colors and flash patterns on the NeckCare sensor to help users identify the device’s current status.

 

### **LED Indicator Patterns**

The NeckCare sensor includes an LED indicator light located above the power button. The LED displays different colors and patterns to indicate the current state of the sensor.

### **Indicator Reference Table**

| **State** | **LED Color** | **LED Pattern** |
| --- | --- | --- |
| Power ON | Green | ON for 2 seconds |
| Bluetooth broadcasting | Yellow | Flash once per second |
| Ready to use (connected) | Green | Flash once every 10 seconds |
| Measuring | Green | Quick flash 2 times every 2 seconds |
| Power OFF | Green | ON for 1 second, then fade out |
| Identify sensor | Red | Very quick flash 8 times, 10 seconds |
| Power saving | - | OFF |
| Charging (≤20%) | Yellow | Fade in/out, 2-second cycle |
| Charging (20-90%) | Green | Fade in/out, 2-second cycle |
| Fully charged (\>90%) | Green | ON (solid) |
| Overheated during charging | Red | Flash 8 times per second |
| Bootloader error | Red | ON (solid) |

- [Practice Marketing Materials](https://help.neckcare.com/practice-marketing-materials?hsLang=en#main-content)

    - [NeckCare Home](https://help.neckcare.com/practice-marketing-materials?hsLang=en#neckcare-home)
- [For Patients](https://help.neckcare.com/for-patients?hsLang=en)
- [Getting Started](https://help.neckcare.com/getting-started?hsLang=en)
- [Setup & Requirements](https://help.neckcare.com/setup-requirements?hsLang=en)
- [Sensor Calibration](https://help.neckcare.com/sensor-calibration?hsLang=en)
- [Hardware & Device](https://help.neckcare.com/hardware-device?hsLang=en)
- [Platform Navigation](https://help.neckcare.com/platform-navigation?hsLang=en)
- [Assessments](https://help.neckcare.com/assessments?hsLang=en)
- [Exercises](https://help.neckcare.com/exercises?hsLang=en)
- [Results & Reporting](https://help.neckcare.com/results-reporting?hsLang=en)
- [Administration](https://help.neckcare.com/administration?hsLang=en)
- [NeckCare Home™](https://help.neckcare.com/neckcare-home?hsLang=en)
- [Troubleshooting](https://help.neckcare.com/troubleshooting?hsLang=en#main-content)

    - [Bluetooth](https://help.neckcare.com/troubleshooting?hsLang=en#bluetooth)
- [FAQ](https://help.neckcare.com/faq?hsLang=en)
- [Maintenance](https://help.neckcare.com/maintenance?hsLang=en)
- [Safety & Compliance](https://help.neckcare.com/safety-compliance?hsLang=en)

[![NeckCare Logo.svg](https://help.neckcare.com/hubfs/NeckCare%20Logo.svg.svg "NeckCare Logo.svg")](http://app.neckcare.com)

support@neckcare.com

<https://www.facebook.com/neckcareofficial> <https://www.instagram.com/neckcare_official/> <https://www.linkedin.com/company/neckcare/> <https://twitter.com/neckcare> <https://www.youtube.com/@NeckCareOfficial>

Copyright © 2025, NeckCare