The xDuoo XP-2 DAC/Amp can function over USB and bluetooth. It comes with bluetooth 5.0 functionality and supports AAC, SBC, and aptX streaming formats. It is made for travel as it weighs just 115g and is compatible with iOS and Android devices. With the two-gain adjustment it can power headphones with high impedance and work as an amplifier with the aux-in port.
Specs:
- Bluetooth: Version 5.0
- Supported Formats: AAC, SBC, aptX
- Output power: 245 mW at 32 ohms
- THD+N: 0.008% (1 kHz)
- Gain: +3 / +9 dB
- Frequency response: 10 Hz–100 kHz (+/- 0.5 dB)
- USB sampling rate: Supports 44.1–192 kHz, 16–24 bit
- Recommended headphone impedance: 16–300 ohms
- USB receiver: Supports Android mobile phone with OTG function and 192 kHz/24 bit lossless transmission at most, computer USB input; supports Windows XP, 7, 8, 10 (with driver installed); Mac
- Battery: 3.7 V / 1,800 mAh
- Battery life
- Aux in: 15 hours
- Bluetooth input: ≥ 12 hours
- USB in: ≥ 8 hours
- Size: 105 x 56 x 15 mm
- Weight: 115 g