Practice/studio pre-amp & HP amp with 10W amplifier,1CH,Active/passive input,5and EQ,limiter,aux input,headphone out,DI out,pre-amp out,battery or AC power Size: 5.28 x 6.2 x 1.75 inch (W x D x H) Power output: 10W RMS Speakers: NONE Net Weight: 2.2 lbs/1kg Volts: 100 to 240V AC or 2x9v battery. Built like a tank with 1/4" thick machined aluminum front and stainless steel chassis, the Bass Buddy is a direct box with pristine pure sound and a crazy clean signal path. But there's a lot more. Active/passive input, 5 band EQ, compressor/limiter, headphone with level, input with level for drum machine or MP3 player, direct out and a speaker out which can actually power a speaker cabinet!