# Device

#### Device List

<figure><img src="https://803875272-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsUGOLnOOPZHTcQBNC5GI%2Fuploads%2Ftqdu3Aw6WxNZaWM14IAE%2Fend-device%20copy.png?alt=media&#x26;token=a2e2c2b6-3092-4339-a70b-c03ba856bf13" alt=""><figcaption></figcaption></figure>

* Device ID: A unique identifier for your device
* Battery: Last battery level of device
* SNR (Signal-to-Noise Ratio): SNR quantifies the clarity of a signal by comparing its strength to the background noise, revealing its quality
* RSSI (Received Signal Strength Indicator): RSSI measures the raw power of a received radio signal, indicating its strength
* Last RX: Last time of a package received from device
* Status: Indicates devices status

#### Send Downlink

You can send a downlink a device or  track your downlink history for a device. The downlink history provides a record of sent downlink messages, showing the message content, port, status, date, and any received responses.

<figure><img src="https://803875272-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsUGOLnOOPZHTcQBNC5GI%2Fuploads%2FtLUiEgXNbO7btDdzLZfM%2Fsend-downlink.png?alt=media&#x26;token=2a098c60-ad86-4fee-a9aa-e61244df8f16" alt=""><figcaption></figcaption></figure>

* Port: Data is directed to the device via the LNS through this designated Port. Such as: "11" (Integer)
* Downlink: Your downlink message. Such as: "020000000C" (Hexadecimal)