sennheiser momentum in-ear wireless black headphones, bluetooth 4.1 with qualcomm apt-x and aac, nfc one touch pairing, 10 hour battery life, 1.5 hour fast usb charging, multi-connection to 2 devices sennheiser the new momentum in-ear wireless combines sleek design, immaculate sound performance and take-anywhere mobility. this premium neckband headset made of luxurious, high-quality materials, offers exceptional hi-fi wireless sound assured by bluetooth 4.1 and qualcomm apt-x. with nfc for simple one touch pairing, an integrated microphone, and a ten-hour battery life, it is the perfect companion to mobile devices. the hd1 in-ear wireless black has now been replaced by the momentum in-ear wireless black. what's in the box? 1) momentum in-ear wireless headset 2) usb charging cable 3) ear adaptor set (xs, s, m, l) 4) carrying case 5) manuals (safety guide & quick guide) precisely what you want to hear well-conceived in every detail, the momentum in-ear wireless provides a rich, uncompromised experience. for superior acoustic precision its stainless steel in-ear sound tunnels have been custom machined. its high-quality dynamic speaker system delivers the signature momentum sound effortlessly: powerful bass response, detailed vocal projection and a great sound stage. play the previous or the next song with the touch of a button. skipping within the song is not supported. refined wireless technology free from cables, full of great sound. thanks to bluetooth 4.1, aac codec support, and qualcomm apt-x compatibility, the momentum in-ear wireless offers true transparent hi-fi sound, so you can experience your music to the full with all the freedom of cable-free listening. while nfc one touch pairing ensures immediate connectivity to smart devices.