Features:

• USB audio decoding and output for PC, functioning as a high quality external USB soundcard*
• Texas Instruments' PCM2706 serves as USB receiver. For better sound quality, a Wolfson WM8740 serves as digital-to-analog convertor (DAC), pairing with a high performance operational amplifier from ADI for the DAC circuit
• Build-in headphone amplifier utilizing AD8692 and Texas Instruments' TPA6130A as pre- and power-amp for high performance, good resolution, low distortion, and powerful output
• Standard 3.5mm stereo line-in jack for portable amplification with conventional audio source
• Dual 3.5mm headphone output jack. Convenient design makes it easy to share music between two listeners
• World's first portable headphone amplifier with dual colors OLED display
• Easy to use digital volume control function with great precision and channel balance
• Build-in EQ for 3 levels of Bass Boost
• Build-in rechargeable 1050 mAH Li-ion battery for 80 hours of continuous operation**
• Specialized dock for connecting E9*** to experience an even higher performance
• Quality anodized aluminum satin finish case design, small and compact, ideal to be wrapped together with digital audio player
• User selectable USB charging function to help prolong battery lifespan and lower distortion from power supply circuit
• User definable startup volume memory and maximum volume limiter to protect user from hearing damage due to loud volume
• Automatic keylock feature
• User definable sleep timer function and total runtime display****

* This model supports driverless plug and play on Windows XP, Windows 2000, Vista, Windows 7, and various Mac OS.
** Full battery charge via computer USB port after 200 minutes and capable of 80 hours of continuous operation, tested under laboratory condition for evaluative purpose only.
*** E9 is a desktop amplifier with greater output, better performance and an integrated E7 specified dock connector. With the dock, E7 can easily establish a line-out connection with E9 and transform both together into a high performance desktop amp with USB decoding function, capable of PC connection and recharging functions, etc.
**** Total system runtime will accumulate from the first use. It will be reset to zero after either reset button is pressed, reloading default setting, or when the battery depleted.

Specifications:

• Output Power: 150mW (16Ω)16mW (300Ω)
• Headphone Impedance Range: 16Ω ~ 300Ω
• SNR: ≥95dB (A weight) on line-in
  SNR: ≥100dB (A weight) on USB-in
• Distortion: <0.009% (10mW)on line-in
  Distortion: <0.008% (10mW) on USB-in
• Frequency Range: 10Hz ~ 1000KHz
• Power Supply: Rechargeable Li-ion battery
• Recharging: USB 5V DC 400mA
• Dimension: 96 x 55x 16mm (approx.)
• Weight: 100g

Package Contents:

• Fiio E7 USB DAC Headphone Amplifier
• USB Cable
• 3.5mm Interconnector Cable
• Silicone Case
• Soft Pouch
• User's Manual