Put on the headphones and block out distracting outside noises. The ANC technology, or active noise cancellation, reflects unwanted sounds and makes them inaudible to the human ear. Enjoy distraction-free audio entertainment or relaxing silence. The ANC function can also be activated without turning on the headset. The long-lasting battery of the BTH-700 Bluetooth in-ear headphones provides up to 11 hours of operation. An adjustable silicone band and comfortable ear cushions ensure a pleasant wearing experience. The headphones can be folded in two directions - inward and flat - making storage and transport easier. Intuitive buttons guarantee convenient and efficient control of the device. The built-in microphone allows you to make phone calls, so you can answer and end a call directly from the headphone panel without having to take out your phone.