DevKit 1 is a necklace form factor device that can be worn around the neck. It runs on Xiao nRF52840, is powered by a rechargeable battery, and connects to your phone to stream the audio data. The device is designed to be used with the Omi app, which is available on the Apple App Store and Google Play Store.
If you didn’t get the original Omi DevKit from the Kickstarter campaign, you can purchase it from the Based Hardware website.
If you prefer to assemble the device yourself, here is the guide
You can get the latest firmware from Omi Github repo