Siemens 6ES5244-3AA21 Temperature Control Board preowned, parts removed from parts room decommissioned equipment no longer needed. I have two of these units, One has paperwork showing test report and minor repairs made, the other was also backup unit with no report. Please designate which board you would like to recieve though they both are the same control boards., and were used on same equipments. Refer to pictures provided , ask questions , no returns accept if damaged by shipping. I warranty for 2 weeks from delivery date. Returns accepted for failed component for 14 days, no exceptions. If it fails contact me before 2 weeks and I will provide return shipping info , after returned and inspection I will provide prompt refund. But I will let you know I have only had 2 returns on equipment in 10 years!!! I check and test before listing.!! Buyer pays 14 for shipping anywhere in USA USPS priority mail, overseas okay through shipping. I am a disabled veterans business and I appreciate your patronage as I would not survive without! Again no returns so please make sure it is the correct ciruict orad you are purchasing.