Six user programmable working modes with dual timing capability. Long pressing the set button enters the P0 parameter mode; adjust the current parameter using the plus or minus button to configure the required work setting. Four button control interface. The device uses plus, minus, set and start/stop buttons for easy operation. There are two sets of time parameters and two T2 values that users can configure. Two configurable time settings. There are two sets of time parameters including T1 and T2 that can be set by the user. Time units and rollover behavior. Time units default to seconds. When decreasing, reaching 0 will roll over to 99.9 s on continued pressing. When increasing, continuing to press will roll over to 0.0.0. Two stage configuration and automatic memorization. First set the time values, for example T1 = 4.05 and T2 = 0.1.0. Then set the P3 parameter; the setting is automatically memorized after about 5 seconds and the timer starts running automatically. Key benefits. Precise countdown with dual timing parameters, flexible mode selection, and an intuitive 4button interface. Parameter entry via long press reduces setup steps, and automatic memorization enables hands operation once configured. Practical use scenarios. Laboratory experiments requiring two sequential or simultaneous timing intervals with quick setup and reliable start. Manufacturing or packaging lines that need repeatable shortcycle timers with memory of a preset configuration. Cooking, classroom demonstrations, or process testing where a quick switch between two timing configurations is helpful. Performance and reliability notes. The device supports multiple presets and easy adjustments with clear increments using plus/minus controls. It provides consistent countdown behavior and immediate start after parameter memorization for streamlined operation.