Google translation of the Japanese web page for specs:
~~I adopt Asahi Kasei Electronics Co., Ltd. high-performance 32bitDAC "AK4480", enter via USB hi-res sound source of maximum 24bit/192k Hz, and output to high-definition.
■ Built-in (programmable logic device) "XMOS" PLD that XMOS Semiconduc tor of the United Kingdom has developed, it corresponds to the high resolution music sources of USB Audio Class2.0.
■ Operation with asynchronous (asynchronous) mode. To perform clock generated independently in the body side, and achieve high quality with reduced jitter.
■ output carries two lines, line output and headphone output (digital input only).
■ line output bus-powered. It can be connected to existing components without the power supply, it can be upgraded acoustic system easily.
■ operational amplifier section delivers sound quality and powerful placing independently the L and R channels will be driven individually.
■ adopt a three-stage switching of high / mid / low, the gain corresponding variety of headphones, earphones.
■ Body made of aluminum with high rigidity lightweight.
■ I adopt the upscale design of black / silver with hairline processing by hand by skilled craftsmen.
■ its long-term and continuous operation of about 20 hours maximum three-hour charge.
~~Frequency characteristic 10Hz ~ 100kHz,-0.5dB (amplifier)
S / N ratio 115dB (amplifier)
Digital input USB: 24bit/192k Hz
Maximum output 125mW +125 m W (16Ω)
Power Built-in lithium polymer battery
Battery life time You may be shortened by 20 hours ※ continuous use conditions.
Charging time About 3 hours
Headphone impedance 8 ~ 300Ω recommended
Connector 3.5mm stereo mini jack × 2, USB mini socket × 1
Accessories USB cable, connecting cable, Windows drivers for built-in USB memory
Dimensions and Weight (Excluding protrusions) W51 × H21 × D92mm, 120g