Specification Brand : Rain Bird BulletPoint1 : Current part number may not match older transformer's part numbers BulletPoint2 : 24VAC Output for all Rain Bird timers, old and new BulletPoint3 : Rain Bird's ONLY internal transformer in production BulletPoint4 : Will work on other manufacturers 24V controllers BulletPoint5 : Genuine OEM Rain Bird transformer Color : white ItemName : Rain Bird Transformer: Replacement Outdoor Transformer for ESP-4M Controller. ItemPackageDimensions_Height : 2.032 centimeters ItemPackageDimensions_Length : 7.366 centimeters ItemPackageDimensions_Width : 11.938 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : automatic-lawn-irrigation-controllers Manufacturer : Rain Bird ModelNumber : ESP-4M MountingType : Chassis Mount PartNumber : PI-SSC-003W-8 ProductDescription : Rain Bird Internal Transformer for all Rain Bird outdoor timers with internal transformers. The part number may vary from original transformer, however this puts out the correct voltage for all Rain Bird timers and even all other manufacturers 24V controllers. It's Rain Bird's only currently produced internal transformer. ProductSiteLaunchDate : 2007-03-30T21:32:35.000-00:00 Size : 8 Zone SupplierDeclaredDgHzRegulation : not_applicable UnspscCode : 39120000