Our BbSpeaker is the most versatile product we have. Easy to pair with smartphone for music and unlimited range to other users. With the Zello App you can use your BbSpeaker as a Walkie Talkie and connect to your friends all over the world. The speaker is also usable as a normal music bluetooth speaker. If you would like a group conversation (intercall with Advance)you are able to let others listen in to the conversation and participate.