Audio-Technica ATH-M20XBT, Bluetooth Headphones, Circumaural, Closed, Dynamic, Frequency range: 5 - 32000 Hz, Impedance: 36 Ohm, Sound pressure level: 100 dB, Driver size: 40 mm, Low latency mode, Bluetooth, Multipoint pairing, Integrated microphone for calls, Remote control buttons integrated into the left ear cups, Battery life: Up to 60 hours, Quick charge function: 10 minutes charging allows for up to 3 hours of battery life, USB-C charging port, Colour: Black, Includes 1.2 m audio cable for optional analogue audio connection