Excellent quality as expected from this brand

These buds need break in, both sound and ear tips. After a few days they really perform, so be patient.

Sennheiser CX 400BT True Wireless Headphones - Black CX-400TW1 BLACK review

While slightly compromised in the features department, the CX 400BT are sonic marvels – and, at this price, hugely appealing

Lively; detailed sound; Lightweight fit; Excellent value for money

Battery life below the best; Not waterproof

CX400BT review

Great sound quality and I prefer these over my Beats headphones. Sale price was 50 percent off so great value.