How about a trek in the Himalaya while In The Hall of the Mountain King hammers through your head Very doable with Sennheiser&rsquos new wireless headphones, with Bluetooth and NFC support to connect to the source gear in your backpack. The bass is great, and the over-ear design cocoons you in it for 25 hours of playback. Just a slide of your finger to control volume, a tap to switch off the music and take a call on the integrated microphone as you hike onwards and upwards. (Rs 24,990, www.en-in.sennheiser.com)