The Unit Dual Button is a dual-button unit that provides two different colored physical buttons for operation. It determines the button status by detecting changes in the high/low level of different button input pins. Dual Button as the name states, has two buttons with different color. If the Button unit is not enough for your application needs, how about double it up to a pair? They share the exact same mechanism, button status can be detected by the input pin status by simply capturing the high/low electrical level. This unit communicates with M5Core through GROVE B port. Applications Game Controller Remote control switch Color: White Material: plastic Package Contents: 1 * Dual Button Unit 1 * HY2.0-4P Grove Cable 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.