These were purchased from a Monaco Chassis factory liquidation in 2009. I do not have any other information on the unit. Meritor Wabco 4461090110 Frame Mounted ECU 12V 4S4M NEW D HABS 175013 A customer added this information about his Freightliner medium duty truck and this is the control unit for the Anti Lock Brakes on it. They are also used on motorhomes with a truck chassis. Here's the link to the website of the manufacturer: I USUALLY HAVE MORE STOCK OF ALL MY ITEMS AND CAN SAVE YOU MONEY IF YOU ARE INTERESTED IN LARGER QUANTITY PURCHASES Other countries must contact me for a postage quote. Please look at my other items in my STORE and add me to your favorites list. Click on See all Categories for additional products. PLEASE SEND ONAN PART NUMBERS OR MODEL AND SPEC. NUMBERS WHEN INQUIRING ABOUT OTHER PARTS. .... Cheers, Mike Posted with Mobile