Foot pedal switch for practice trees and vTreePro practice tree software (simulates throttle switch), and adaptive technology programs. (Practice tree clutch or brake simulation). Can be used as a driver interface device with vTreePro Practice Tree Software or for other practice trees. (USB interface (USB106A) required for use with PC software including vTreePro Practice Tree Software). Has a 6 foot cord and 1/8" mono plug. 1/4" plug adapter available for Port-a-Tree products.