HTC One M9 - Manual (Page 246)

Connectivity 233
Stream Music to Blackfire Compliant Speakers
Play music simultaneously to multiple Blackfire compliant speakers from your phone.
Before you start, make sure your speakers are connected to your Wi-Fi network. Refer to the
documentation that comes with your speakers to set up and connect them to your Wi-Fi network.
1. After connecting your speakers to your Wi-Fi network, open a music app on your phone.
2. Swipe up with three fingers on the screen.
Your phone then turns Wi-Fi on automatically and scans for media devices on your Wi-Fi
network. You'll then see the available speakers listed.
3. Tap the speaker you want to connect to.
4. In the music app that you're using, start playing music. You'll then hear the music play from the
speaker you've selected.
5. To switch between speakers or to group them, swipe up the screen again with three fingers.