Line 6 Delay Stompbox Modeler The DL4 Delay Modeler offers you an incredible array of sounds, from a tube driven, tape loop echo (complete with adjustable wow and flutter), through 24 bit squeaky clean digital echo, to real-time reverse delay. Not only that, but you've got complete programmable control over all aspects of the sound in the studio and on the stage. Incredibly simple to use, it's an amazingly powerful tool offering you delay effects never before available in a single box. 3 programmable presets and on-board Tap Tempo True Bypass switching, so your direct tone is exactly that; direct from your guitar to your amp Expression Pedal Input - for real time control of all effect settings DL4 runs in discrete stereo, both inputs and outputs, so Left stays left and Right stays right. (Loop Sampler sums signal to mono) Runs from batteries