1. Introduction
The mooas Time Loop Digital Visual Timer is a versatile and portable device designed to assist with time management and focus. It features a clear LCD display, visual countdown ring, and multiple functions including count-up, count-down, and repeat modes. This manual provides detailed instructions for its setup, operation, and maintenance.
2. Product Features
- Rechargeable Wireless Timer: Built-in battery for portability and convenience.
- Intuitive Color Timing Ring: Visual representation of time elapsed or remaining.
- Count Up/Down Function: Supports timing up to 99 hours for count-up and 60 minutes for count-down.
- Repeat Function: Allows up to 99 repetitions for recurring tasks or intervals.
- Dual Dials for Easy Setting: Quick adjustment of minutes and seconds.
- Clear LCD Display: High-contrast screen with large font size.
- 3-Level Brightness Adjustment: Adapt display brightness to various environments.
- 3-Level Alarm Volume: Mute, Low, and High volume options.
- Battery-Saving ECO Mode: Extends battery life by reducing power consumption.
- Multiple Mounting Options: Includes a stand and magnetic back for flexible placement.
3. Package Contents
Please check that all items are present in the package:
- mooas Time Loop Digital Visual Timer (Model MT-S4)
- USB Type-C Charging Cable
- User Manual (this document)
4. Product Overview

Figure 4.1: Front Panel Controls (Repeat Button, M Dial, S Dial)

Figure 4.2: Back Panel Controls (Power Switch, ECO Switch, Brightness Button, USB-C Port)
5. Setup
5.1 Initial Charging
Before first use, fully charge the timer. Connect the included USB Type-C cable to the charging port on the back of the device and plug the other end into a 5V USB power adapter (not included). The battery icon on the display will blink while charging and become solid when fully charged.

Figure 5.1: Connecting the USB Type-C Charging Cable
5.2 Power On/Off
Slide the power switch on the back of the device to the 'ON' position to power it on. Slide it to 'OFF' to power off the device.
6. Operating Instructions
6.1 Timer Setting (M/S Dials)
The timer is set using the two dials on the front: 'M' for minutes and 'S' for seconds.
- Rotate Dial Clockwise (+): Increases the time.
- Rotate Dial Counter-Clockwise (-): Decreases the time.
- Short Press Dial: Pauses or resumes the timer.
- Long Press Dial: Resets the timer to 00:00.
6.2 Count Up Mode
To use the count-up function:
- Ensure the display shows 00:00.
- Briefly press either the 'M' or 'S' dial to start counting up.
- One white block fills every second, and one yellow block fills every 60 seconds.

Figure 6.1: Count Up and Count Down Display
6.3 Count Down Mode
To use the count-down function:
- Rotate the 'M' and 'S' dials to set the desired countdown time (up to 60 minutes).
- Briefly press either the 'M' or 'S' dial to start the countdown.
- The visual ring will decrease as time elapses.
6.4 Repeat Mode
The repeat mode allows the timer to run for a set duration multiple times (up to 99 repetitions).
- Set your desired countdown time using the 'M' and 'S' dials.
- Briefly press the 'REPEAT' button on the front panel to activate Repeat Mode. A number and repeat icon will blink on the screen.
- Rotate the 'M' or 'S' dials to set the number of repetitions.
- Press either 'M' or 'S' dial to start the countdown. Each time the timer completes a cycle, the repeat count decreases by one.
To turn Repeat Mode ON/OFF, short press the 'REPEAT' button. To reset the repeat count to 0, long press the 'REPEAT' button.

Figure 6.2: Repeat Mode in action
6.5 Brightness Adjustment
The display brightness can be adjusted to three levels: High, Medium, and Low. Briefly press the 'BRIGHT' button on the back of the device to cycle through the brightness levels. The default setting is High.

Figure 6.3: 3-Level Brightness Adjustment
6.6 Volume Adjustment
Adjust the alarm volume using the slide switch on the back of the device. There are three settings: Mute, Low, and High. An icon at the top right of the screen indicates the current volume level. In mute mode, only the screen blinks when the timer ends.

Figure 6.4: 3-Level Volume Adjustment Switch
6.7 ECO Mode
Activate ECO mode using the slide switch on the back of the device to save battery power. In ECO mode, the display brightness is set to the lowest level to reduce power consumption, extending usage time on a single charge.

Figure 6.5: ECO Mode Display
7. Mounting Options
The mooas Time Loop Digital Visual Timer offers two convenient mounting options:
- Standing Mode: Utilize the adjustable stand on the back to tilt the timer up to approximately 45 degrees for stable placement on any flat surface.
- Magnetic Mode: The built-in magnet on the back allows the timer to be securely attached to metal surfaces, such as whiteboards or refrigerators.

Figure 7.1: Standing and Magnetic Mounting Options
8. Specifications
| Material | Acrylonitrile Butadiene Styrene (ABS), Glass |
| Weight | 0.26 Pounds (approx. 0.12 kg) |
| Dimensions (D x W x H) | 3.39" x 1.46" x 1.18" (8.6cm x 3.7cm x 3.0cm) |
| Power Input | USB Type-C (5V 1A) |
| Charging Time | Approx. 4.5 hours |
| Usage Time (Lowest Brightness) | Approx. 266 hours |
| Usage Time (Maximum Brightness) | Approx. 40 hours |
| Model Number | MT-S4 |
9. Troubleshooting
- Timer not turning on: Ensure the power switch on the back is in the 'ON' position. Check if the battery is charged; connect to a power source using the USB-C cable.
- Display is dim: Adjust the brightness using the 'BRIGHT' button on the back. If in ECO mode, brightness is automatically set to low.
- Alarm is not sounding: Check the volume switch on the back. Ensure it is not set to 'Mute'. In mute mode, only the screen blinks.
- Dials are unresponsive: Try turning the device off and then on again. Ensure the device is not in a paused state (briefly press a dial to resume).
- Timer not charging: Ensure the USB-C cable is securely connected to both the timer and a working 5V power adapter. Try a different cable or adapter if available.
10. Safety Information
- Do not expose the device to extreme temperatures, direct sunlight, or high humidity.
- Avoid dropping or subjecting the device to strong impacts.
- Do not attempt to disassemble or repair the device yourself. Contact customer support for assistance.
- Keep out of reach of small children to prevent accidental ingestion of small parts.
- Use only the provided or a certified USB Type-C cable for charging.
11. Warranty and Support
mooas products are designed for reliability and performance. For warranty information, technical support, or service inquiries, please refer to the contact information provided on the product packaging or visit the official mooas website. Please retain your proof of purchase for warranty claims.
12. Product Video
This video demonstrates the key features and operation of the mooas Time Loop Digital Visual Timer, including its visual countdown, repeat function, and various applications in study and exercise routines.