When i went to the music shop and look at the inside of show room, i attracted with the unique stompbox name called Ultra Phase Shifter. I know it was a shifter effect, but it's really makes me very exciting, so i go on tried it's sound. Amazing! the sound likes very cool, vintage and calm. So i buy it. The stompbox not so weight, it's like theother behringer stompbox, its using 9 V battery or 12 V DC adaptor. Easy to control the panel and enjoyable to play, cause its sound is very phaser..