TECH NOTES This is the Field Link Portable Programmer Car Card from Castle Creations. FEATURES: Programs Castle car controllers without a computer Works as a complete USB Castle Link with your computer Works with all Castle Link compatible car products INCLUDES: One Field Link Portable Programmer Card One USB cable REQUIRES: Windows PC Castle Link Software  SPECS: Length: 55mm (2.2") Width: 85mm (3.3") Thickness: 5mm (0.20") COMMENTS: Will only work with Castle controller firmware released after 2007 cnh 1/27/10 ir/jxs   BOX DIMENSIONS: 3.63" W. X .88" H. X 8.00" L. BOX WEIGHT: .20 LBS.