Coupled with smartphone (iPhone) the Fidelio M1 Bluetooth accompanies me in my travels. With a small footprint this lightweight headset (180 gr.) Mobile, discreet, comfortable. Closed design, I do not risk annoying the neighbors in transport. The Getting Started Guide (12 languages including French) helps enable Bluetooth and handling for taking calls or listening to music. The incoming call cut music and the phone is ringing in the headphones. Pressing the right atrium picks / hangs up while resuming music playback. Powerful Sound High Definition fate of Loudspeakers (4 cm.) To vent that extend the bass response, offset the drop in the level of low frequencies. Positioned in the right atrium of the microphone is an amazing phone quality. Prolonged use is comfortable, the leatherette ear cups do not heat the ears. If the battery (battery life up to 10 h.) Is empty listening continues with the cable (jack) included. The headset is charged via the USB port of a computer.