KST-900 Wireless BT Over-ear Headphones

Features:
[Wireless Connection] Easy to pair with almost all BT-enabled audio devices to enjoy wireless stereo music.
[3.5mm Wired Connection] With 3.5mm audio jack, it can connect to a variety of music players (Such as, MP3 / MP4, etc) without BT function.
[Hands-free Calling] High-sensitive microphone reduce ambient noise and grasp the detail of voice, offering high quality hands-free phone conversation.
[Long Duration Time] Built-in rechargeable 180mAh Lithium battery lasts more than 6 hours of Playing Time and more than 180 hours of Standby Time per charge cycle.
[Ergonomic design] Adjustable headband length, super soft rotating earmuff, comfortable to wear and easy for storage.
Note:
When using the headset as a wire headset, the microphone can't work and headphone keys are useless.