Note: This is a multi-choice link, pls pay attention to the type you need, thanks.

1 key :

This product can be used with various development boards. The external input device of the development board only takes up 8 standard IO ports, and can realize 16 key scanning and independent input. The interface is 2.54mm and the wire length is 8cm. It is recommended to use together with the display interface such as 1602 LCD display screen. The back can be torn off and pasted on the smooth surface.

1 Key with light:

This thin film button adopts dupont head, plug spacing: 2.54mm, can be directly inserted into the ordinary pin, use more convenient; Line length: 35cm; Length and width of button: 3.5*2.0cm; Thickness: < 1 mm

2 key :

This product can be used with various development boards. The external input device of the development board only takes up 8 standard IO ports, and can realize 16 key scanning and independent input. The interface is 2.54mm and the wire length is 8cm. It is recommended to use together with the display interface such as 1602 LCD display screen. The back can be torn off and pasted on the smooth surface.

12 Key:

This product can be used with various development boards. The external input device of the development board only takes up 8 standard IO ports, and can realize 16 key scanning and independent input. The interface is 2.54mm and the wire length is 6.5cm. It is recommended to use together with the display interface such as 1602 LCD display screen. The back can be torn off and pasted on the smooth surface.

20 Key:

This product can be used with various development boards. The external input device of the development board only takes up 8 standard IO ports, and can realize 16 key scanning and independent input. The interface is 2.54mm and the wire length is 9.5cm. It is recommended to use together with the display interface such as 1602 LCD display screen. The back can be torn off and pasted on the smooth surface.