BEHRINGER DYNAMIC WAH DW400 Ultimate Auto-Wah/Human Voice Effects Pedal The ultimate Auto-Wah/Human Voice effects pedal to create classic wah effects and unbelievable human-voice, "talking" sounds Real Sound Modeling (RSM) combines state-of-the-art DSP technology with sophisticated algorithms to emulate real acoustic environments Take off with incredible auto-wah sounds that can be controlled manually, via tap-tempo mode or expression pedal (not included) Dedicated Mode, Sensitivity, Manual and Decay controls for awesome sound shaping Blue status LED for effect on/off and battery check Runs on 9 V battery or the BEHRINGER PSU-SB DC power supply (not included) First-class electronic On/Off switch for highest signal integrity in bypass mode High-quality components and exceptionally rugged construction ensure long life Conceived and designed by BEHRINGER Germany If you think you"ve heard everything an auto-wah can possibly do, sit back and listen to the DW400 say a mouthful! This is one exceptionally expressive wah pedal. Wah-wah-what??? A wah pedal uses a filter to sweep through a wide frequency spectrum, boosting and exaggerating specific tones. As the sweep approaches the higher frequencies, the result is vowel-like sounds reminiscent of the human voice. In the earliest wah pedals, this sweep was controlled by manual manipulation of a footswitch reminiscent of a see-saw. With the DW400, the sweep occurs automatically according to your control specifications. Or you can plug in an expression pedal (not included) to go old-school. And with BERHINGER"s Real Sound Modeling technology, the DW400 emulates the human voice like nothing of its kind. It"s Easy! You can either control the DW400"s frequency sweeps by tapping a tempo with your foot or by simply setting the dials. You"ll have your guitar speaking in tongues after selecting one of three modes: Synth/Up/Down, Human Voice and Tap Tempo Modes. Next, tweak the Vowel (A/E/I/O/U) Sensitivity, Manual Vowel selection and Decay dials to create exactly the wah sound you desire. You can power this pedal with a 9 V battery or a DC Power Supply (not included). Value Give your guitar a whole new voice with the DW400, and you will have everyone talking. Check it out today at your nearest BEHRINGER dealer.