This is a 9V fixed-voltage MyVolts-branded power supply designed to meet exactly the power specification of your Swiffer 1-l4000-000 PSU part. PLEASE NOTE: This power supply unit does not fit the Swiffer L4000. If you are not sure if this product fits your Swiffer model, please get in touch before you buy, we'll be happy to advise. Specifications: - Output voltage is 9V - Max. output amperage is correct for your device - Output tip is the right size and specification - we've tested it thoroughly - 2 pin plug for use with US (Type A) wall sockets - Input voltage is 100-120V AC, 50/60Hz In addition, this myVolts-branded replacement power supply for Swiffer 1-l4000-000 PSU part 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 adaptor fails within 2 years from purchase, we'll replace it, no worries.