OMNIHIL 12 Volt 1 Amp Power Adapter, AC To DC, 2.1mm x 5.5mm Plug, Regulated Omnihil 12V 1A Power Supply Wall Plug Adapter rating: world wide 100v ~ 240v 50/60hz High quality PSU/transformer regulated/center tip positive Ovp, ocp, scp protection (ovp: over voltage output protection Omnihil brand power adapters come with 2 year manufacturer warranty 2.1Mm x 5.5Mm x 10mm dc plug