Spider III 15 Features: 4 Essential Amp Models (Clean, Crunch, Metal, Insane) 6 Smart Control FX Effects (2 simultaneous) including phaser, Chorus/Flanger, Tremolo, Sweep Echo, Tape Echo, and Reverb 4 User-programmable channels CD/MP3 input jack Headphone/Direct Out for practice or recording Custom 8-inch Speaker 15-Watt Mono Dimensions: 15.5L x 14.5H x 8.25D