Similar to this deal
https://www.ozbargain.com.au/node/602358
Cashrewards 7%
Both colours available at the time of posting.
Seems to be a consensus it's a cheaper version of the Momentum true wireless 2.
Lots of reviews.
https://www.rtings.com/headphones/tools/compare/sennheiser-m…
https://www.soundguys.com/sennheiser-cx-400bt-true-wireless-…
https://www.androidcentral.com/sennheiser-momentum-true-wire…
Tempting for the price.
These are a little bit cheaper at JB Hi-Fi, Harvey Norman, TGG, Officeworks, Amazon, etc. Delivery may be extra though.