Free Express Shipping! FiiO Q7 Desktop-Class Headphone Amplifier with Bluetooth Ultracompact, Lightweight, and Portable, Power: 3000mW Desktop / 1500mW Portable, PCM Up to 32-Bit / 768 kHz, DSD512 & MQA, 1/4" & 2.5, 3.5, 4.4mm Headphone Outputs,...