The Holman CO1904 is a battery-operated, single-outlet tap timer that automates watering schedules for gardens and lawns. With customizable run times ranging from 2 to 240 minutes and flexible interval options from 6 hours to 7 days, it offers precise control over irrigation. The rain sensor compatibility allows for automatic shutoff during rainfall, preventing overwatering. Manual operation enables on-demand watering cycles without affecting the programmed schedule. The device operates on two AA alkaline batteries and features a clear LED indicator for easy monitoring of its status.