Just set it & relax. Temporarily override normal programming with timed rain delay, pause automatic watering for up to 72 hours, or timed manual watering. Easy to program. Water tight. Uv resistant. Attaches to any outdoor faucet. 24 start times per day. Minimum 15 psi required. Requires 2 aa alkaline batteries not included. For 3/4" faucet/hose spigot hook up, inlet 3/4" female hose thread swivel, outlet: 3/4" male hose thread.