Introduction
Thank you for choosing the QUMOX F8 Hourglass Gravity Timer. This digital timer is designed for various timing needs, from studying and cooking to exercise and work, offering intuitive control through its unique flip mechanism. Please read this manual carefully to ensure proper use and maintenance of your device.

Image: The QUMOX F8 Hourglass Gravity Timer, showcasing its digital display and key features like hourglass animation, magnetic absorption, and flip timing.
Product Features
- Smart Flip Control: Start, pause, or reset the timer by simply flipping its orientation.
- Clear LED Hourglass Display: Features a unique hourglass animation with large, easy-to-read digital numbers.
- Adjustable Timing: Supports countdowns from 1 to 99 minutes.
- Silent or Audible Alerts: Choose from three sound levels (High, Medium, Mute) for flexible use in any environment.
- Magnetic & Portable Design: Built-in magnets allow attachment to metal surfaces, and its compact size ensures portability.
- Rechargeable Battery: Equipped with a 1200mAh rechargeable battery, providing up to 180 days of use on a single charge.

Image: Visual representation of the QUMOX F8 timer's core features, including its hourglass display, digital readout, magnetic capability, flip timing, and long battery life.
Package Contents
Please check the package for the following items:
- QUMOX F8 Hourglass Gravity Timer
- USB-C Charging Cable
- User Manual (this document)
Component Identification
Familiarize yourself with the different parts of your QUMOX F8 timer:

Image: Detailed diagram illustrating the various buttons and ports on the QUMOX F8 timer for easy identification.
- Volume Button: Adjusts the alert sound level.
- Start / Pause Button: Manually starts or pauses the timer.
- Roller: Used to set the desired time duration.
- Silicone Anti-slip Pad: Provides stability and prevents slipping.
- Horn: Emits audible alerts.
- Power Button: Turns the device on or off.
- Charging Port: USB-C port for recharging the internal battery.
Setup
Charging the Timer
Before first use, fully charge your QUMOX F8 timer. Connect the provided USB-C cable to the charging port on the timer and plug the other end into a compatible USB power adapter (not included). The LED display may indicate charging status. A full charge provides up to 180 days of standby use.
Placement Options
The QUMOX F8 timer features a magnetic back for convenient placement. You can attach it to various iron surfaces such as refrigerators, whiteboards, or metal cabinets. Ensure the surface is clean and dry for optimal magnetic adhesion.

Image: The QUMOX F8 timer shown attached magnetically to a refrigerator door, highlighting its versatile placement.
Operating Instructions
Powering On/Off
Press and hold the Power Button (refer to Component Identification) for a few seconds to turn the timer on or off.
Setting the Timer Duration
Use the Roller on the top of the device to adjust the desired countdown time. The timer supports durations from 1 to 99 minutes. Rotate the roller to increase or decrease the time shown on the LED display.
Starting, Pausing, and Resetting
- To Start: Once the desired time is set, flip the timer so the display faces downwards to begin the countdown. Alternatively, press the Start / Pause Button.
- To Pause: Place the timer flat with the screen facing upwards. The countdown will automatically pause. You can also press the Start / Pause Button.
- To Resume: Flip the timer back to the display-down position or press the Start / Pause Button to resume the countdown.
- To Reset: If the timer is paused or counting down, flipping it to the display-down position after a countdown ends will initiate a count-up. To reset to a new countdown, simply adjust the time with the roller.

Image: The QUMOX F8 timer demonstrating its flip control feature, showing how changing its orientation can pause or resume the timer.
Adjusting Sound Settings
Press the Volume Button (refer to Component Identification) to cycle through the three available sound levels: High, Medium, and Mute. Select Mute for silent operation, ideal for environments requiring focus without auditory distractions.

Image: Two QUMOX F8 timers in a quiet study environment, with an icon indicating silent mode, emphasizing its use for concentration.
Maintenance
Cleaning
To clean your timer, gently wipe the surface with a soft, dry cloth. Do not use abrasive cleaners, solvents, or immerse the device in water, as this can damage the electronics.
Battery Care
To prolong battery life, avoid fully discharging the timer frequently. Recharge the battery when the low battery indicator appears. Store the timer in a cool, dry place when not in use for extended periods.
Troubleshooting
If you encounter issues with your QUMOX F8 timer, please refer to the following common problems and solutions:
- Timer not turning on: Ensure the battery is charged. Connect the USB-C cable and allow it to charge for at least 30 minutes before attempting to power on again.
- Timer not responding to flip control: Ensure the timer is placed on a stable, flat surface. Avoid excessive tilting or movement during operation, as this can cause unintended pauses or resets.
- Display is dim or blank: The battery may be low. Recharge the timer. If the issue persists after charging, contact customer support.
- Alert sound is not working: Check the volume setting using the Volume Button. Ensure it is not set to Mute.
- Inaccurate timing: Ensure the timer is placed on a stable surface and not subjected to vibrations or sudden movements during operation.
Technical Specifications
| Brand | QUMOX |
| Model Number | F8 (B1254) |
| Color | White |
| Material | Plastic |
| Product Dimensions (D x W x H) | 1.18" x 3.94" x 2.13" (3cm x 10cm x 5.4cm) |
| Item Weight | 3.68 ounces (104g) |
| Battery Type | Rechargeable (1200mAh) |
| Battery Life | Up to 180 days (4320 hours) on a single charge |
| Timing Range | 1-99 minutes |

Image: A summary of the QUMOX F8 timer's key specifications, including its flip timing, volume levels, timing range, and battery life.
Warranty Information and Customer Support
Specific warranty details for the QUMOX F8 Hourglass Gravity Timer are not provided in this manual. Please refer to the retailer's return policy or the product packaging for warranty information.
For further assistance, technical support, or inquiries regarding your QUMOX F8 timer, please contact the seller or manufacturer through the platform where the product was purchased. Keep your purchase receipt or order number handy for faster service.