Description 3 Pin Button Key Switch Module Color: Red Used to control the electronic device Output type: Digital signal Interface mode: PH2.0 ~ 3P Working voltage: 3.3 V - 5 V The 3 Pin Button Key Switch Module (Red) is used to control an electronic device. It is usually used as a switch to connect or disconnect circuits. Under normal circumstances, the two contacts of the button are in the open state, and they only close when the button is pressed. View more What's Included 1x 3 Pin Button Key Switch Module (Red) Dimensions Size Module: 34 x 25 mm Specifications Color: Red Working voltage: 3.3 V - 5 V Output type: Digital signal (Press the key, high level | Release the key, low level Interface mode: PH2.0 ~ 3P Weight: 49 g