This is an over-ear Bluetooth HQ headset from Thomson, with Bluetooth 4.0 and SPT (Stable Phase Technology) chip set for wireless and free music enjoyment and/or for telephony. The headphones are rechargable with a recharge time of three hours giving up to fifteen hours of running time. The Thomson WHP6027 has a built in microphone so, if you are using it with a mobile phone, you can also use it as a headset so that you can make and receive phone calls. It does have a wired option. This is so you can use it on an aircraft in Flight Mode or if you just want to connect it direct to your phone to save the battery. • High-quality audiophile sound due to: High-quality paired components such as: 50 mm Loudspeaker Combined with High-Quality Bluetooth Technology (CSR 4.0 Chip) and SPT Chip Set • The headphone\'s closed headset system with the extra-soft ear pads ensures punchy and yet insulated sound • Control buttons on the headphones support the remote function for music control with Play/Pause/Next track/Previous track and telephone functions (Pause/Hang up/On/Off) and volume control • Integrated microphone for telephone calls or voice commands • Simple toggling between music and calls • Integrated battery with a run time of up to 15 hours and a charge time of 3 hours • Also suitable for e.g. Internet telephony (VoIP, Skype)