Pack Of 2 Genuine STMicroelectronics  L7805CV 5 Volt 1.5 Amp Fixed Voltage Regulators.  These regulators are ideal replacements for damaged 5 volt regulators in TVs, arcade cabinets, power adaptors, wireless routers, computer power supplies or for use in Arduino projects or your own DIY 5v regulator. Please see the typical circuit and pin out in the listing photos. I am a fully qualified electronics engineer with over 30 years experience, so if you have any questions please ask and I will get straight back to you. Thanks for looking.