Headamp's Pico is a small-sized portable headphone amplifier and is only 40% of the size of Headamp's next largest amplifier, the AE-2. The Pico can be used in a pair with Headamp's USB DAC (optional 24/96 upsampling) and is designed with short signal paths for high-quality frequencies. It is equipped with a two-position gain switch and a volume control with built-in power switch. Headamp's Pico hosts 3.5mm out and line input jacks and two LED (power and charging) lights as well as a two-cell lithium polymer battery. A DC adaptor, leather bag and USB cable (if USB DAC is added) are included with purchase of the Pico.