[More points/details]: 3.5+4.4mm dual outputs, OLED display, FiiO Music app, PC/BT/PHONE three modes with one button *The battery life has been updated in the new firmware
FIIO has a PEQ algorithm and user interface that allows you to adjust frequencies, gain levels, and bandwidth in any mode to customize the sound to your preference.
[XMOS XUF316 USB chip]: BTR15 headphone amps is capable of asynchronous audio decoding under USB Audio Class 2.0. As a USB DAC, the BTR15 portable amplifier can decode up to 384kHz sampling rate and native DSD.
[Independent power supply for amp]: The specially designed external power supply features low noise and high current, resulting in a 40% increase of output power to 340mW
[Support MQA 8x ]: A new addition to the updated BTR15 bluetooth headphone amps is support for MQA Renderer, allowing for high-resolution, master-level sound quality in reasonably sized files well-suited for your mobile device.
[Support full hi-res wireless Bluetooth format]: QCC5125 Bluetooth 5.1 receiver designed to deliver studio-quality sound through your ears WIRELESS - the bluetooth amplifier BTR15 Bluetooth version 5.1 supporting high-resolution formats such as AAC/SBC/aptX/aptX Low Latency/aptX Adaptive/LDAC up to 96kHz, you can get a totally portable yet excellent sounding setup with your device!