> For the complete documentation index, see [llms.txt](https://docs.senstream.com/senstream-researcher-ring-application-user-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.senstream.com/senstream-researcher-ring-application-user-guide/senstream-research-ring/connectivity.md).

# Connectivity

### Ready for Connection

When the ring is disconnected from power, it will <mark style="color:blue;">**flash blue**</mark> signaling that it is ready to establish a bluetooth low energy (BLE ™ ) connection with your iOS device.&#x20;

<div align="left"><figure><img src="/files/3QQJnVAb6gmaBqn2xm9c" alt="" width="225"><figcaption></figcaption></figure></div>

Please refer to the [Senstream iOS app documentation for instructions on how to pair the ring](/senstream-researcher-ring-application-user-guide/ios-mobile-app/pairing-a-ring.md).

The ring will also flash blue after pairing if the ring loses its connection due to the session closing.

***

### Ring is added to a Session

Once paired to your device the LED will turn to a <mark style="color:green;">**solid green**</mark> state indicating it is paired.

<div align="left"><figure><img src="/files/3DwRnzOAuSNAzerMgQpf" alt="" width="225"><figcaption></figcaption></figure></div>

It will remain in this state for about two minutes until the ring goes into a low power sleep mode. If the ring isn’t paired during that time it can be powered up by simply moving it.