Bose Wireless Surround Speakers for Soundbar 500/700 and SoundTouch 300 Soundbars, Bose Black, Pair | Reverb
Amazon.com: Universal Under TV Mount, Black, Compatible with Bose Smart Soundbar 300/500/550/600/700/900/Ultra, TV Speaker, Soundtouch 300 - Invisible Once Fitted, Fast & Easy Way to Mount Your Sound Bar : Electronics
Bose Smart Soundbar 300 vs Bose TV Speaker Comparison and Review with Sound Test - YouTube