Honsenn BN900 Active Noise Cancelling Headphones, Wireless Bluetooth Over the Ear Headset with Mic for Phone-Call Control- Black (HS-BN900) 1, Foldable design, it's convenient to take outside and it can save much space.2, With flexible steel inside the headband, the headphone can be extended easily. So it can great suitable for different people’s head shape. 3, The cushion is made from protein leather, which is soft,breathable, and environmentally friendly.4, Active noise cancellation technology with feedback ANC to reduce ambient noise up to 25dB for full music immersion. Prevent 98% low frequency noise and 80% normal noise around you.5, With built-in 550 MAH battery, the headphone can be played for 25 hours.6, Higher quality built-in microphones provide hands-free calls. Bluetooth version 5.0, provides more powerful Bluetooth transmission connection function.7, Drag and drop function: BN900 can connect two devices at the same time.8, The ear shell can be 90 degrees swiveling, which makes it more durable and comfortable.9, VOICE ASSISTANT10, Fast chargin: a fully charged BN900 can be obtained within an 2 hours.11, High sound quality: This business headset has powerful leak-tolerate 40mm speakers for rich, high definition audio for calls & music. Experience a whole new standard of calls on the go with 3 built-in microphones for absolute clarity, every time.