Product Features 1. Alarm function: Up to five alarm sets can be programmed, each sounding for 60 seconds. This feature is ideal for general alarm use and especially beneficial for users who require multiple wake-up reminders. 2. Countdown timer: Supports a maximum countdown of 23 hours and 59 minutes (some units support up to 99 minutes and 59 seconds). After countdown completion, the alarm sounds for 60 seconds. The device includes memory retention, automatically restoring the previously set countdown time. Press any key to stop the alarm beep, then press the "M/S" button to restart the countdown. This function is convenient for time-sensitive environments such as telecommunications, banking, and food service industries. 3. Users can freely set five sets of interval times and countdown durations. 4. Five alarm modes with 60-second audible alerts. 5. Time format: 12-hour or 24-hour display, switchable. Button Functions 1. Set (Mode): Press and hold to enter setup mode. 2. H/M: Adjust hour value (used for time setting; flashes during countdown setup). 3. M/S: Adjust minute value (used for seconds during countdown), and used to start or stop alarm or countdown. Usage Instructions Product includes a user manual. Please refer to the physical product for accurate model-specific details. Product Details 1. Requires one AAA battery (battery not included). 2. LCD window size: 50mm x 28mm. Outer dimensions: 80mm x 56mm x 22mm. 3. Weight: 62 grams per unit. 4. Alarm sound: DDD tone. Volume is suitable for most users. Note: Individuals who are heavy sleepers may not be awakened by this alarm. Purchase with caution. No returns or exchanges accepted due to sound volume preferences. 5. Built-in magnet and bracket with hanging hole on the back. Can be attached to metal surfaces, placed on a desk, or hung vertically.