# 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="https://1269099890-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTbF0CSiQwottzSBUH4wc%2Fuploads%2FitJzKWhZ4JUeN0i5vNxy%2F4.4_ring_02_sess_01_blueflash.gif?alt=media&#x26;token=0befc215-7315-4998-9ff9-95bbcd62f36d" alt="" width="225"><figcaption></figcaption></figure></div>

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

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

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### 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="https://1269099890-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FTbF0CSiQwottzSBUH4wc%2Fuploads%2F3xRik655hSoUKi31zJ97%2F4.4_ring_02_sess_02_led_green_paired.jpg?alt=media&#x26;token=1525d3a9-546c-4042-9e6b-602faa2c2cb6" 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.