ECOOPRO Wireless Bluetooth 4.0 Stereo Headphones Headset Earphones with Built-in Microphone for Listening to Music and Talk Over the Phone or Tablets, Up to 10 Hrs Battery Life (Orange) Bluetooth 4.0 stereo over ear headphone/headset, 40mm drivers for wide frequency response. Built-in microphone for hands-free phone calling, simply press the phone button on the earpiece to accept incoming calls then press again to terminate the call. Comfortable wearing-soft PU leather ear pads and adjustable headband for long time comfortable wearing. Lightweight and foldable- make it easy to storage and transport anywhere you want. Rechargeable battery for up to 10 hrs music and passive mode for normal, corded operation without battery.