Technics EAH-Az40G-K wireless headphones in excellent condition are for sale. Headphone type: In-Ear. Bluetooth connection provides ease of use. Built-in microphone and active noise cancellation (ANC) will provide high-quality sound and comfortable communication. Speaker diameter is 6 mm, frequency range is 20 - 20,000 Hz, resistance is 32 Ohm. Call control and charging case are also included. Charging time is 3.5 hours, operating time is up to 19 hours. Headphones weight is 45 g. Color is black.