See instructions here:
To wirelessly connect the bass module or optional wireless surround speakers:
1. Connect either the bass module or surround speakers to power
2. On the remote control, press the SoundTouch button
3. Press and hold 7 on the remote until the connectivity indicator on the soundbar blinks white. Once connected, the connectivity indicator on the soundbar glows white and a tone is heard from the connected speaker(s)
* To connect additonal speakers, repeat these steps. (Note: One pair or surround speakers and up to two bass modules can be connected)
USAV Solutions
USAVSHOP.COM
Bose Wireless Surround Speakers for Soundbar 500/700 and SoundTouch 300 Soundbars, Bose Black, Pair
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Bose Wireless Single Cube Surround Speakers for Bose Soundbar Sound Touch 300
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Bose Wireless Double Cube Surround Speakers for Bose Soundbar SoundTouch 300
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