Sennheiser CX 400BT True Wireless - For Those Of You Who Think Momentum Is Too Expensive
Sennheiser MM 400 Bluetooth® stereo headset with built-in microphone and hands-free operation at Crutchfield
Sennheiser CX 400BT True Wireless Earbuds - Bluetooth In-Ear Headphones for Music and Calls - with Noise Cancellation and Customizable Touch Controls, Black
Sennheiser presents new affordable true wireless headphones | NextPit
Sennheiser CX 400BT True Wireless Earbuds - Bluetooth In-Ear Headphones for Music and Calls - with Noise Cancellation and Customizable Touch Controls, White