1The indicator light indicates when the heater output is turned on, which is safer and can be expanded to control other accessories. 2For Pololu board is on the pin header socket, can be easily replaced or disassembled for future designed and use. 3Including multiple types of modules or components , which can completely meet your needs. 4Made of high quality PCB material, which has good stability and durability. 5Practical accessory kit completely fit for Reprap printer, reliable to use. Condition: 100% Item Type: 3D Printer Kit Material: PCBColor: As picture shownFitment: Fit for Reprap 1 Set of for RAMPS 1.4 Board (16pcs)1 x Module1 x 12864 Smart Display Controller8 x Connecting Wires6 x Limit Switches5 x A4988 Chip Board5 x Heat Sink1 x Module Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.