The Monolith™ Electrostatic Headphones are the ultimate portable electrostatic headphones. Featuring extremely low distortion and a portable amplifier, the open back headphone design delivers a wide soundstage and exceptional sound. The headphones are extremely lightweight and the rechargeable amplifier fits easily into your pocket. For no compromise sound on the go or at home, the Monolith Electrostatic Headphones deliver no compromise sound reproduction.