1. Introduction
The MARATHON 100 Hour Direct Entry Digital Tabletop Timer is designed to assist with precise time management for various tasks. Featuring a large, easy-to-read LCD display and a direct entry keypad, this timer offers both countdown and count-up functionalities, a clock mode, and memory presets for repetitive events. Its robust design includes a magnetic back and an integrated kickstand for versatile placement.
2. Product Overview

Figure 1: Front view of the Marathon Digital Timer.

Figure 2: Timer on a kitchen counter, highlighting large display and loud alarm.

Figure 3: Timer showcasing dual function, included batteries, and versatile memory.
Key Features:
- Direct Entry Keypad: For quick and precise time setting.
- Large LCD Display: Easy-to-read numbers for clear visibility.
- Dual Function Alarm: Supports both countdown and count-up timing up to 99 hours, 59 minutes, and 59 seconds.
- Loud Ring Alarm: Audible across a room.
- LED Indicator: Flashing light for silent alarm or hearing impairment assistance.
- Clock Feature: Displays time in 12-hour or 24-hour format when not in timer mode.
- Built-in Memory Function: Stores up to four consecutive times for interval timing and four memory presets for repetitive events.
- Versatile Placement: Integrated kickstand for tabletop use and magnetic back for attachment to metal surfaces.
- Batteries Included: Comes with 2 AA batteries.
3. Setup
3.1. Battery Installation
- Locate the battery compartment cover on the back of the timer.
- Slide the cover open.
- Insert two (2) AA batteries, ensuring correct polarity (+/-) as indicated inside the compartment. The timer comes with batteries included.
- Replace the battery compartment cover securely.

Figure 4: Back view with battery compartment and kickstand.
4. Operating Instructions
4.1. Mode Selection
Use the MODE switch located on the side of the timer to select between different functions:
- CLOCK: Displays the current time.
- INTERVAL TIMER: For setting multiple consecutive timers.
- COUNT-UP: Functions as a stopwatch.
- TIMER: For setting a single countdown timer.

Figure 5: MODE switch for function selection.
4.2. Setting the Clock
- Slide the MODE switch to CLOCK.
- Press and hold the SET button until the time digits begin to flash.
- Use the number keypad (0-9) to enter the desired time (HH:MM).
- Press SET again to confirm and exit clock setting mode.
- To switch between 12-hour and 24-hour format, press the 12/24H button (if available, or refer to specific model instructions).
4.3. Setting a Countdown Timer (TIMER Mode)
- Slide the MODE switch to TIMER.
- Use the number keypad (0-9) to directly enter the desired countdown time (HH:MM:SS). The timer supports up to 99 hours, 59 minutes, 59 seconds.
- Press the START/STOP button to begin the countdown.
- To pause the timer, press START/STOP again. Press it once more to resume.
- When the countdown reaches zero, the alarm will sound, and the LED indicator will flash. The timer will then automatically begin counting up to show elapsed time since the alarm.
- To stop the alarm and clear the display, press the CLEAR button.
4.4. Using the Count-Up Timer (COUNT-UP Mode)
- Slide the MODE switch to COUNT-UP.
- Ensure the display shows 00:00:00. If not, press CLEAR.
- Press the START/STOP button to begin counting up.
- To pause the count-up, press START/STOP again. Press it once more to resume.
- To reset the count-up timer to zero, press CLEAR.
4.5. Using Memory Functions (M1-M4 Presets)
The timer features four memory buttons (M1, M2, M3, M4) for storing and recalling frequently used times or for interval timing.
- In TIMER mode, enter the desired time using the number keypad.
- Press and hold one of the memory buttons (M1-M4) until the display confirms the time has been saved.
- To recall a saved time, simply press the corresponding memory button (M1-M4). The saved time will appear on the display, ready to start.
- For interval timing, set the first interval, save it to M1. Then set the second interval, save it to M2, and so on. You can then cycle through these presets as needed.
4.6. Adjusting Alarm Volume
The timer features a volume switch, typically located on the side or back, allowing you to select between different alarm levels (e.g., High, Low, Mute) or a flashing LED indicator for silent operation.
5. Maintenance
- Clean the timer with a soft, damp cloth. Do not use abrasive cleaners or immerse the unit in water.
- Avoid exposing the timer to extreme temperatures or direct sunlight for prolonged periods.
- If the display becomes dim or the alarm weakens, replace the batteries promptly.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Timer not turning on. | Batteries are dead or incorrectly installed. | Check battery polarity or replace with new AA batteries. |
| Display is dim. | Low battery power. | Replace batteries. |
| Alarm is not sounding. | Alarm volume is set to mute or low. | Check the alarm volume switch and adjust as needed. |
| Timer not responding to button presses. | Unit may be in a locked state (if applicable) or requires a reset. | Remove and reinsert batteries to perform a hard reset. Check for any lock switches. |
7. Specifications
- Model: TI030018WH
- Brand: MARATHON
- Material: Plastic
- Dimensions: 4.45 x 2.64 x 4.45 inches
- Item Weight: 7.1 ounces
- Power Source: 2 x AA batteries (included)
- Max Timer Duration: 99 hours, 59 minutes, 59 seconds
- Features: Direct Entry, Dual Function (Count-up/Count-down), Clock, Memory Presets, LED Indicator, Magnetic Back, Kickstand
- UPC: 063442000342

Figure 6: Product dimensions.
8. Warranty and Support
For warranty information or technical support, please refer to the manufacturer's official website or contact their customer service department. Keep your purchase receipt as proof of purchase.





