Shaky Jimi Vibe Rotary speaker effect. Sound sample link: https://www.youtube.com/watch?v=XTwMsXzwBGI Rate, Depth and Hue frequency control. Vibrato/Chorus mode switch. Tough-built metal enclosure with metal stomp switch. True bypass stomp switch. Size : 5 1/2 " H x 3 3/4" W x 1 1/2" D Weight: 1 lb 2 oz