# 10) Meaning of LED indicators and audio signals

The Solar uses an LED and audio signals to indicate its operating status, battery level and various operations.

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**Blue LED — operation and Bluetooth**

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The blue LED indicates the operating status of the instrument and the Bluetooth connection.

* **single blue LED blink**: waiting for Bluetooth connection
* **fast double blue LED blink**: connected to a Bluetooth application

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**Orange LED — charging status**

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The orange LED indicates the battery charging status when the Solar is connected to a USB power source.

* **orange LED with slowly varying intensity (wave effect)**: battery charging in progress
* **steady blue LED**: battery fully charged

Solar charging operates automatically in the presence of light and does not trigger the orange LED.

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**Startup audio signal**

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When turning on, the Solar emits a melody indicating that the instrument is ready to operate.

A series of beeps then indicates the battery level:

* **3 beeps**: high battery level
* **2 beeps**: medium battery level
* **1 beep**: low battery

If the battery is too low, the instrument will not start.

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**Variometer audio signal**

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In flight, the Solar emits audio signals corresponding to your vertical speed:

* **high-pitched sounds**: climb,
* **low-pitched sounds**: descent,
* **no sound**: stable air.

The volume can be adjusted using the button or via Syride Link.

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**Zeroing audio signal**

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When the zeroing function is enabled, a specific audio signal is emitted when the air mass is close to neutral.\
This signal is only activated during flight.

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**Shutdown audio signal**

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When turning off, a melody confirms that the instrument has shut down correctly.