1、GOOD COMPATIBILITY: Prototype expansion development board, with 170 jacks design, equipped with breadboard, has good compatibility. 2、MAIN PURPOSE: Used to build circuit prototypes, you can solder components directly, or connect circuits through a mini breadboard. 3、SIMPLE STRUCTURE: Expansion board with 2 LEDs and 2 button circuits, all pins and power are drawn out, can be used to build circuit prototypes. 4、EASY TO USE: Components can be soldered directly on the board, or through a small circuit board above, which is connected by double sided tape. 5、DURABLE MATERIAL: Using excellent resin material, with high and low temperature resistance, not easy to age or corrode, has long service life. 2 x Modules2 x Breadboards Item Type: Mini BreadboardMaterial: ResinWorking Voltage: 3-5VCircuit Board: SYB-170Features: Expansion board with 2 LEDs and 2 circuit buttons