Requiring neither power nor batteries, this Orbit(R) Mechanical Hose Faucet Timer works justlike a windup timer. Twist the oversized comfort grip dial to the desired watering duration between 15 and 120 minutes, and it will automatically shut off at the end. Manual watering is also an option with the manual water override. The ergonomic swivel and high-impact construction make this an easy-to-use and durable sprinkler timer. | Orbit Mechanical Hose Faucet Timer