Sennheiser CX Series Headphones

Pocket-size true wireless CX earbuds and CX neckband earphones differ in wearing style, with earbuds charging in a case and neckband using a cable band.

Battery runs 20 hours on CX 400BT and 10 hours on the neckband, while CX Plus adds ANC with 24 hours total.

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Sennheiser CX 350BT Wireless Neckband Earphones 10-Hour
Sennheiser CX 400BT True Wireless Earbuds White 20-Hour
Sennheiser CX Plus True Wireless Earbuds ANC 24-Hour
Sennheiser CX True Wireless Earbuds Bass Boost