Because your acoustic guitars deserve to sound exactly as they were meant to AP1 utilizes our Acoustic Preamp, DI and Tuner Out.On top of that, we added a switchable Boost function (with our well-known Hi-Cut feature) for soloing, or if you have a guitar with a lower output. The pedal is designed for full compatibility with worldwide voltages spanning 100-240VAC. Whether you use piezo pickups, as well as built-in or external microphones, AP1 will make your guitar sound the way it was meant to. In addition, the Radio/Wireless input and all outputs feature custom-made audio transformers. Specifications Hi-Z Cable InputTransformerbalanced Gold-plated Neutrik XLR Radio/Wireless InputTransformer-balanced Gold-plated Neutrik XLR DIAdjustable Boost function w/Hi-CutTransformer-balanced Tuner Output9VDC output for powering your tunerUnique RFI protection and Silent SwitchingAll Caveman Audio products come with a 10 Year WarrantyAll Caveman Audio products come in road-ready, zinc-plated steel enclosuresDimensions (metric) : 220 x 145 x 40/65 mm (WxDxH)Dimensions (imperial) : 8.66” x 5.71″ x 1.57″/2.56″ (WxDxH)Weight: 2 kg / 4 lbs. 7 oz.Power requirements: 100-240VAC 50/60Hz