Justup Digital Alarm Clock Ju816 User Manual

Introduction

The Justup Ju816 Digital Alarm Clock combines classic aesthetics with modern functionality. It features a large LED display for clear visibility of time, date, and temperature. Designed for heavy sleepers, it includes a super loud alarm. Its silent operation ensures a peaceful environment, and a night light function provides convenience in the dark. This clock supports both USB power and battery operation with a memory function.

Setup

1. Power Supply

The Justup Ju816 alarm clock can be powered in two ways: via USB cable or with 3 AAA batteries. For continuous display and optimal performance, USB power is recommended. Batteries primarily serve as a memory function to retain settings during power outages or when unplugged, preventing the need to reset the time and alarm.

Image: The alarm clock can be powered by USB for continuous display or by 3 AAA batteries for memory function and power saving mode.

• USB Power: Connect the provided USB cable to the clock and a compatible USB power adapter (not included) or a USB port. The display will remain continuously lit.
• Battery Power: Insert 3 AAA batteries into the battery compartment. In battery-only mode, the display will automatically turn off after 10 seconds of inactivity to conserve energy. It can be reactivated by voice control (sound detection).

2. Initial Time and Date Setting

Refer to the control buttons on the back of the clock. Typically, there are buttons for 'SET', '+', and '-'.

• Press and hold the 'SET' button to enter time setting mode.
• Use the '+' and '-' buttons to adjust the hour, then press 'SET' to confirm and move to minutes.
• Repeat for minutes, year, month, and day.
• The clock supports 12/24-hour format. This can usually be toggled during the time setting process or via a dedicated button.

Operating Instructions

1. Setting the Alarm

The alarm clock features a loud, mechanical bell-style alarm.

Image: The alarm clock features a loud, mechanical bell-style alarm, suitable for heavy sleepers.

• Press the 'ALARM' button (or 'SET' button repeatedly until alarm icon flashes) to enter alarm setting mode.
• Use the '+' and '-' buttons to set the desired alarm time.
• Press 'ALARM' (or 'SET') again to confirm.
• To activate/deactivate the alarm, locate the alarm toggle switch or button (often labeled 'ON/OFF' or represented by an alarm icon).

2. Display Modes (Time, Date, Temperature)

The clock can display time, date, and temperature. By default, it may cycle through these displays or show only the time.

Image: The main display of the Justup Ju816 Digital Alarm Clock showing the time.

• Press the 'MODE' button (or similar) to cycle through time, date, and temperature displays.
• Some models may have an automatic cycling mode that can be enabled or disabled in settings.

3. Night Light and Power Saving Mode

The clock features a circular night light and an energy-saving display mode.

Image: The clock's display can turn off to save energy and features a soft circular night light for visibility in the dark.

• Power Saving Mode: When running on battery power, the LED display will automatically turn off after 10 seconds of inactivity. To reactivate the display, make a sound (e.g., clap your hands) or press any button.
• Night Light: The circular light around the display provides a soft glow for viewing the time at night. This light can typically be activated by a button press or is part of the display activation. To prevent sleep disturbance, the display can be turned off by long-pressing the '-' button. Pressing any button will turn it back on.

Maintenance

• Cleaning: Wipe the clock with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Battery Replacement: If using batteries, replace all three AAA batteries simultaneously when the display becomes dim or the memory function fails. Ensure correct polarity.
• Environment: Avoid placing the clock in direct sunlight, extreme temperatures, or high humidity.

Troubleshooting

• Alarm does not sound or is difficult to turn off: Ensure the alarm is activated. To turn off the alarm, you may need to press the '-', '+', or 'ZZ' (snooze) button on the back. The alarm mechanism is designed to be loud and may require a deliberate action to deactivate.
• Display turns off frequently: If running on battery power, this is normal for power-saving mode. Reactivate by sound or button press. If connected via USB and the display still turns off, check the USB connection and power source.
• Date/Temperature not displayed simultaneously with time: The clock typically cycles through these displays or requires a button press to switch. It may not be designed to show all three simultaneously. Use the 'MODE' button to switch or enable automatic cycling if available.
• Incorrect temperature reading: The internal temperature sensor may be affected by the clock's own heat or ambient conditions. Minor discrepancies are common for integrated sensors.
• Clock loses settings: Ensure batteries are installed correctly and are not depleted, even when using USB power, as they provide memory backup.

Specifications

Image: Dimensions of the Justup Ju816 Digital Alarm Clock.

Warranty and Support

For warranty information or technical support, please refer to the product packaging or contact your retailer. Keep your purchase receipt for any warranty claims.