Fiio E7 USB DAC Headphone Amplifier, 10Hz to 100KHz Frequency, 3.5mm Input/Output

The Fiio E7 USB DAC Headphone Amplifier is a compact headphone amplifier that provides analog and digital input and output for high-quality listening. It offers USB audio decoding and output for PC, functioning as an external USB sound card. It has a USB receiver from Texas Instruments, a Wolfson digital-to-analog converter and an ADI amplifier to offer exceptional audio quality with low distortion and strong output.

The amplifier has a standard 3.5mm line input for compatibility with a variety of music players, laptops and other devices. It also has a pair of 3.5mm outputs so you can connect 2 pairs of headphones or earbuds simultaneously. The amp has a digital volume control for excellent precision and balance. There is also a built-in EQ that provides 3 levels of Bass Boost.

The E7 has an anodized aluminum satin finish case for looks, durability and minimal weight. It also has a dual-color OLED display for clear readouts. The integrated rechargeable Li-ion battery provides up to 80 hours of continuous operation so you can listen for days without recharging.

The E7 has a number of user-selectable functions, including a selectable USB charging function to prolong battery life, as well as a definable startup volume memory and maximum volume limiter to help prevent hearing damage due to loud volume levels. There is an automatic keylock feature to prevent accidental changes, plus a sleep timer function that's ideal for use at night.