California Air Tools EZ-1-2301 is an Automatic Drain Valve with an analogue electronic timer, designed to control the open (pulse) and closed (pause) cycles of solenoid valves. It features adjustable cycle potentiometers offering on and off cycle options, and bright yellow LEDs indicate in which cycle the timer is operating. The EZ-1-2301 is suitable for use with air compressors and can be used to automatically drain condensation from the air tank. It can be set to open the valve for a duration of 0.5 to 10 seconds, and the interval between openings can be set from 0.5 to 45 minutes.