Product Type: COB LCD Module Product model: YT4004BBW-01 Dot matrix: 40 characters * 4 lines Dimensions: 190.00*54.00*14.00mm Window size: 147.00*29.50mm Display color: white text on blue background/black text on yellow-green background/black text on gray and white background are optional Application scope: Suitable for various instruments and meters, industrial automation, communication equipment systems, etc.