The Diptronics EPM-02-V-T/R Dip Switch Piano Type End Stackable is a type of switch designed for use in electronic devices. It features 8 positions, is made out of plastic, and has a gold-plated copper contact. The switch has two terminal pins, a red lead for positive voltage, and a black lead for ground. It also has single pole/double throw mechanism, meaning it has two sets of switching terminals. The switch is designed to provide momentary or latching operation. The metal terminal pins are electrically isolated from each other to prevent accidental shorting when the switch is on. The switch is easy to operate and can be used for a variety of applications, such as volume control, frequency control, and data entry.