SUPERIOR SOUND QUALITY – AptX ensures minimal signal loss for HD audio. 40mm magnetic NdFeB driver provides a large sound field with powerful bass and crystal-clear highs. BLUETOOTH 5.1 HEADSET – Upgraded Qualcomm chipset with Bluetooth 5.1 ensures lower power consumption, longer playback, and faster and more stable transmission. CRYSTAL-CLEAR VOICE CALL – The high-quality built-in microphone with cVc 8.0 noise cancellation technology ensures crystal-clear voice quality for all your phone conversations. DESIGNED FOR YOUR COMFORTABILITY – 15° inclination design with soft leather makes the earmuff comfortable to wear. The head beam is stretchable for a comfortable and snug fit. 55 HOURS OF PLAYTIME – Edifier W800BT Plus Bluetooth Headphones have a built-in 670mAh battery that will provide you with about 55 hours of music playing time.