Propagation timers, also called a Mist timer, allows water durations from 1 second up to 12 hours in 1 second increments. Use the propagation timer for greenhouses, nurseries, irrigation, mist cooling and propagation. The #548 Mist Timer being introduced in early 2016 features an easy to set digital screen with 16 pre-set programs. The 9v battery gives this quality timer that added long life for timing in seconds.We feature a 4, 6 and 9 station AC timer that operates a 24 volt sprinkler valve. You can easily setup a manifold with multiple valves and water lines for your greenhouse. For those of you in need of a single valve, we have a ¾” threaded valve with the controller attached. With the help of 2 plastic fittings you can convert it for faucet use.