HIFIMAN Deva-Pro Over-Ear Full-Size Open-Back Planar Magnetic Headphone with Bluetooth Dongle/Receiver, Himalaya R2R Architecture DAC, Easily Switch Between Wired and Wireless, Bluetooth 5.0

Acoustically Invisible Stealth Magnet: Unlike the sound waves created by a conventional magnet, the special shape of Stealth Magnets enables the waves to pass through the magnets without generating interference. HIFIMANs advanced magnet design is acoustically transparent, dramatically reducing wave diffraction turbulence that degrades the integrity of the sound waves. The reduced distortion yields pure sonic output that is accurate and full-range.
HIFIMAN Heritage: HIFIMANs NEO "supernano" Diaphragm (NsD) - The new NsD is 80% thinner than previous designs, resulting in fast response and detailed image with lush, full range sonics.
Bluemini R2R, Small but Mighty- The DEVA-Pro companion
Bluetooth/USB module: HIFIMAN Custom-created HIMALAYA R2R Architecture DAC: Non-over Sampling Concept; Low-energy Consumption; High Sampling Rates
Easily Switch Between Wireless and Wired: The socket can accommodate both dual-sided unbalanced 3.5 mm cable and a single-sided 3.5 mm balanced cable (left socket). Bluemini R2R is easy of use by connecting on the left socket. Input Option 1 Bluetooth A variety of HD Bluetooth protocol (Bluemini connection on the left socket) Input Option 2 Wired Inbox 3.5 mm balanced cable ( 3.5 mm TRRS on the left)