Features:
HiFi headphone amplifier, great for high-impedance phones to have a mellow and plump sound.
Dual ways input: 3.5mm & RCA (L & R) interfaces.
Use the "Select" to choose the input way. (Eg: When you choose "3.5mm" audio in, don't have to pull out the "RCA" line.)
High precision power divider circuit can guarantee the stability of the circuit.
6.35mm headphone output interface and a adapter (6.35mm to 3.5mm) for almost all of the headphone.
High-quality aluminum alloy case, exquisite and durable.

Specifications:
Material: Aluminum alloy
S/N: >=105dB
Distortion: <=0.003%
Frequency range: 20Hz - 30kHz
Powered by: DC 24V
Power adapter: US Input: 100-240V 50/60Hz 0.3A
                            Output: 24V 0.5A
Item size: Approx.13 * 7 * 3cm / 5.1 * 2.8 * 1.2in
Item weight: 208g / 7.4oz
Package size: 22 * 16.5 * 6cm / 8.7 * 6.5 * 2.4in
Package weight: 444g / 15.7oz

Package List:
1 * Headphone amplifier
1 * Adapter (6.35mm to 3.5mm)
1 * Power adapter(US)