ITEM NAME:Eletronics 16x16 Dot Matrix Module LED Display Microcontroller For Description: 16x16 LED Dot Matrix Display Module Kit Compatible Interfaces for Supply Voltage: DC5v; Principle: Each row consists of two 74HC138 decoder composed of 4-16 + transistor drive; each column driven by the two 74HC59; when the line output high, low cross point of the column output LED is lit; LCD12864 compatible interfaces, plug and play; Rich routines provide 51 for Aduino microcontroller and routines. Specification: Material: FR-4 Epoxy Glass Fiberboard Color: Multi-color Size(LxWxH): Approx. 10.8x6.5x0.8cm/4.25x2.56x0.31inch Package Includes: 2 pieces Platooninsers 1 piece Dot Matrix Module 1 piece Dupont Line Note: Pls allow an error of 1-3mm due to the difference of manual measurement..1 piece Dot Matrix Module. Principle: Each row consists of two 74HC138 decoder composed of 4-16 + transistor drive; each column driven by the two 74HC59; when the line output high, low cross point of the column output LED is lit;.