Moen "Buffalo" EQ/Overdrive/DI/Headphone Amp .. Wow! High / Mid / Low + contour Middle shift EQ to retouch the tone. Volume and Attenuation adjustments / Pre-amplifier connection. Built-in Amplifier Simulator. Balanced/Unbalanced Direct Output High quality headphone output. Tough-built metal enclosure with metal stomp switch Size: 5 1/4 " H x 3 3/4" W x 1 1/2" D Weight: 1 lb 5 0z