FiiO BTR17 Portable Bluetooth DAC & Headphone Amplifier

FiiO BTR17 Portable Bluetooth DAC & Headphone AmplifierBTR17 brings together FIIO's years of expertise in developing DACs and headphone amps. Withing a compact package, it fits flagship level features such as multi stage audio architecture and precision power supply system comparable to other high end players and DAC headphone amp combos. It is truly a master of all trades that will once again become a new standard amongst Bluetooth headphone amps. Covering all uses One switch for multiple uses On the

BTR17 brings together FIIO's years of expertise in developing DACs and headphone amps. Withing a compact package, it fits flagship-level features such as multi-stage audio architecture and precision power supply system comparable to other high-end players and DAC/headphone amp combos. It is truly a master of all trades that will once again become a new standard amongst Bluetooth headphone amps.

Covering all uses
One switch for multiple uses
On the BTR17 is a convenient PC/BT/PHONE three-position switch which allows it to seamlessly switch between operating modes. Switching modes allows the BTR17 to optimize its power supply status according to the device connected, making it perfect for various use cases.

PC(computer sound card): The device is completely powered by the computer. BT(Bluetooth DAC and amp): The device is powered by the internal battery, and when connected to USB can be used for charging and power supply.
PHONE(phone dongle): The device's internal battery participates in power supply, reducing the power consumed from the connected phone. 

Multi-stage power supply
Precise power allocation
Three-stage ten-rail precision power supply, Boundless energy