Handwritten in blue pencil on the side of the aluminum frame
Stamped into the side of the aluminum frame
overall: 1/2 in x 4 1/2 in x 14 in
The module consists of a printed circuit board with various components, surrounded by an aluminum frame and Blue plasic 22 pin connector. At the end of the board opposite the connector there is a single toggle switch. There is a green "QC APPROVED" sticker on one side of the frame, and a model number sticker on the other side.