Sennheiser Mm 400 X Bluetooth Headphones Review
Sennheiser MM 400-X Bluetooth headphones design The lightweight 400-X headphones fold up and can be packed into the included soft travel case, along with a cable should the battery run down (Sennheiser claims it will keep going for 10 hours) or you want to connect to a non-Bluetooth device, such as an in-flight entertainment system (there’s even a two-jack airline adapter included, which is a nice touch). The MM 400-X remind me of my once-favoured Sennheiser PX 200-II headphones that I loved for their portability and sound but had to repeatedly replace due to an inherent weakness in the cable by the jack....