Bose Base Module 700 Wireless Subwoofer for Bose Soundbars, White - Walmart.com
Bose Bass Module 700 Wireless Subwoofer for Bose Soundbars, Black - Walmart.com
Rtings.com finally did a full review of the Bose Soundbar 700 with surround speakers and bass module: https://www.rtings.com/soundbar/reviews/bose /soundbar-700-with-speakers-bass-module : r/bose
Bose Bass Module 700 - Black | P.C. Richard & Son
$799 Bose Bass Module Unboxing and Testing - YouTube