Product Features 1. Alarm function: Up to five alarm sets can be programmed, each with a 60-second ringtone. This feature is ideal for general 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 device emits a 60-second alert tone. Memory function automatically restores the previously set countdown time. Press any key to stop the alarm sound and return to the set time. Press the "M/S" key to start the next countdown. This function is convenient for time-sensitive tasks in industries such as telecommunications, banking, and food service. 3. Users can freely set five sets of interval times and countdown durations. 4. Five alarm modes, each with a 60-second alert sound. 5. Time format: 12-hour or 24-hour system is selectable. 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). M/S: Adjust minute value (used for time setting; adjusts seconds during countdown setup) and used to start or stop alarm or countdown. Usage Instructions Product includes a detailed user manual. Note that manuals may reference other models within the same product series. Refer to the actual device for accurate operation. Product Details 1. Requires one AAA battery (battery not included). 2. Display window size (LCD): 50mm x 28mm. Outer dimensions: 80mm x 56mm x 22mm. 3. Weight: 62 grams per unit. 4. Alert sound: Standard tone, volume suitable for most users. Individuals who are heavy sleepers may not be awakened easily. Purchase with caution. No returns or exchanges accepted due to sound volume preferences. 5. Built-in magnet and stand with hanging hole on the back. Can be attached to metal surfaces, placed on a desk, or hung vertically.