The ATH-M50xBT harnesses the legendary M50x studio sound for an exhilarating wireless listening experience, with exceptional clarity and deep, accurate bass response. Utilizing Bluetooth wireless technology and 45 mm large-aperture drivers with rare-earth magnets and copper-clad aluminum wire voice coils, the ATH-M50xBT brings the coveted sonic signature of M50x to a wireless, on-the-go design Features Wireless, on-the-go design delivers the same critically acclaimed sonic performance as the original ATH-M50x professional studio headphones Touch control provides convenient access to voice assist Mic and button controls built into the earcup allow for easy handling of calls, music playback and volume adjustment Proprietary 45 mm large-aperture drivers deliver exceptional clarity throughout an extended frequency range, with deep, accurate bass response Over-ear design for excellent sound isolation in loud environments Professional-grade earpad and headband material for long-lasting durability and comfort Up to 40 hours of continuous use on a full charge Compatible with aptX and AAC codecs Specifications Parameter Specifications Type Closed-back dynamic Driver Diameter 45 mm Frequency Response 15 – 28,000 Hz Sensitivity 99 dB Impedance 38 ohms Battery DC3.7 V lithium polymer rechargeable battery Battery Life Approx. 40 hours continuous use Weight 310 g without cable and connector Charging Time Approx. 7 hours (for 0-100% charge) Cable Detachable 1.2 m iS controller cable with mic Connector 3.5 mm (1/8″) stereo mini-plug Magnet Rare earth Voice Coil CCAW (Copper-clad aluminum wire) Microphone Type Condenser Microphone Sensitivity -42 dB (1V/Pa at 1 kHz) Microphone Frequency Response 80 – 10,000 Hz Microphone Polar Pattern Omnidirectional Accessories Included 30 cm (1.0′) USB charging cable, protective pouch Bluetooth® Bluetooth® Version Bluetooth Version 5.0 Operating Range Line of sight – approx. 10 m (33′)