So these are the Sennheiser CX True Wireless earbuds… they're the successors to the Sennheiser CX 400BT’s True wireless earbuds that came out in the Summer of 2020. Now these earbuds aren’t a MAJOR upgrade from their predecessors… but they do have some very important improvements to them… and I’l even say it right now I think these sound better than the Sennheiser Momentum 2’s which have been my number 1 favorite sounding earbuds for a while now… and these just have me even more excited for the Sennheiser Momentum true wireless 3’s.