LED lights table
The below table explain in detail the meaning of both LED lights colours and status.
| LED light colour | Blinking speed | Device status |
 | Slow | Synchronising with GPS signal and measuring heart rate with the WizShirt |
| Fast | Synchronised and ready to use with the WizShirt |
 | Slow | The sensor is charging |
 | Steady ON | The sensor is fully charged |
 | Slow / Fast / Steady | It needs to be updated to latest Firmware version. If the LED is still red after updating, the device has an issue. |
| Note | |||
 | Blinking LED light |  | Steady LED light |