This 12V fixed-voltage power supply is designed to meet the exact power specifications of your Vox VT20X Guitar amp. Specifications: - Output voltage is 12V - Max. output amperage is correct for your device - Output tip is the right size and specification - Thoroughly tested - 2 pin plug for use with US (Type A) wall sockets - Input voltage is 100-120V AC, 50/60Hz This replacement power supply for Vox VT20X Guitar amp is: - Compliant with all safety standards, and features overvoltage, overcurrent and short-circuit protection to protect your device from damage - Energy Star level 6 approved, guaranteeing more efficient delivery of power to your devices, at less cost to you - RoHS and CE-certified - Covered by a 2 years' warranty: if the power adapter fails within 2 years from purchase, we'll replace it, no worries.