HIFIMANHE-R10D HiFi Closed Dynamic Headphones with R2R DAC Bluetooth Adapter

HiFiMAN HE-R10D Dynamic Topology Driver Close-Back Over-Ear Headphones with Bluemini R2R for Home, Studio and Recording, Easily Switch Between Wired and Wireless, Bluetooth Headphones

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

HIFIMAN HE-R9 Closed-Back Over-Ear Dynamic Headphones with Topology Diaphragm-Wired