Inputs, buttons and knobs are placed conveniently on the top surface of the SRI-2. No need to look down to see what is engaged. All are clearly in view while recording. LED indicators on all buttons and knobs able you to monitor your settings even in dimly lit studios. Ample Power from Headphone output. One of the most powerful headphone outputs in a USB powered device. Create tracks and overdubs with plenty of clarity and power. Works with headphones up to 250 ohms.