The keypad is a binary input module. Different signals can be sent through various operations such as short press, long press, and press-and-release. Compared to three-position joystick modules, the keypad module only has two states: "pressed" and "released," and always automatically resets to the "released" state. This module can be used to switch between multiple modes in a specified sequence or to trigger and stop certain actions in real time. For example, it can trigger a firing action on a model with a firing mechanism or switch lighting modes and colors on a model with RGB light strips: Color: Black Material: plastic Package Contents: 3 x Single-Button Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.