1. Producte acabatview
The JUSTUP Digital Double Bell Alarm Clock combines classic design with modern functionality. It features a loud double-bell alarm, a clear LED digital display for time, date, and temperature, and silent operation. Designed for various users, including heavy sleepers, this clock offers both USB plug-in and battery power options.

Figura 1: Frontal view of the JUSTUP Digital Double Bell Alarm Clock.

Figura 2: Mésview de les principals característiques del despertador.
Característiques principals:
- Loud Double Bell Alarm: Produces a crisp mechanical ringing sound over 70 decibels, suitable for heavy sleepers.
- Pantalla digital LED: Clearly shows time, date, and temperature.
- Funcionament silenciós: No ticking sound, ensuring a quiet environment.
- Funció de llum nocturna: Circular night light on the dial for easy viewa les fosques.
- Modes d'alimentació dual: Operates via USB plug-in or 3 AAA batteries (for memory and temporary use).
- 12/24 Hour System: User-selectable time format.

Figure 3: Product dimensions of the alarm clock.

Figure 4: Illustration of the alarm clock's loud ringtone feature.

Figure 5: The alarm clock's display in day and night settings, showcasing the night light.
2. Configuració
2.1 Font d'alimentació
The alarm clock supports two power modes: USB plug-in and battery power. For continuous display and optimal functionality, the USB plug-in mode is recommended.
- USB Plug-in Mode: Connect the provided USB cable to the clock and a compatible USB power adapter (not included) or a USB port. This mode ensures the display remains continuously on.
- Battery Power Mode: Insert 3 AAA batteries (not included) into the battery compartment on the back of the clock. In battery mode, the screen will automatically shut down after 10 seconds to conserve power. To wake the screen, gently touch the clock or use the voice-controlled wake-up feature. Batteries also serve to retain settings during power outages.

Figure 6: Two power supply methods: USB plug-in and battery powered.
2.2 Identifying Controls
Familiarize yourself with the buttons on the back of the alarm clock:

Figura 7: posterior view of the alarm clock with control buttons labeled.
- Botons +/-: Used to increase or decrease values during setting.
- Gear Icon Button: The 'Set' button, used to enter setting modes and confirm selections.
- Bell Icon Button: The 'Alarm Setting' button, used to set and activate alarms.
- Sun/Zzz Icon Button: Used to adjust display brightness and activate snooze.
3. Instruccions de funcionament
3.1 Configuració de l'hora
- Premeu el botó Gear Icon (Set) button to cycle through time, date, and temperature display modes.
- Per fixar l'hora, premsa llarga el Gear Icon (Set) fins que els dígits de les hores parpellegin.
- Utilitza el botons +/- per ajustar l'hora.
- Premeu el botó Gear Icon (Set) button again to confirm the hour and move to minutes.
- Utilitza el botons +/- per ajustar els minuts.
- Premeu el botó Gear Icon (Set) button one last time to confirm minutes and complete the time setting.
The clock supports both 12-hour and 24-hour formats. This setting is typically adjusted during the initial time setup or through a dedicated setting option (refer to the video for visual guidance).
Video 1: Detailed instructions on how to set the time and alarm, and turn off the alarm on the JUSTUP Digital Alarm Clock.
3.2 Configuració d'una alarma
- Premeu el botó Bell Icon (Alarm Setting) button to enter alarm setting mode. The alarm time will flash.
- Utilitza el botons +/- to adjust the desired alarm hour.
- Premeu el botó Bell Icon (Alarm Setting) button again to confirm the hour and move to minutes.
- Utilitza el botons +/- to adjust the desired alarm minutes.
- Premeu el botó Bell Icon (Alarm Setting) button one last time to confirm minutes and activate the alarm. An alarm clock symbol will appear on the display, indicating the alarm is set.
- The clock may offer multiple alarm settings (e.g., two or three). Repeat the steps to set additional alarms if available.

Figure 8: Visual representation of the alarm ringing.
3.3 Turning Off the Alarm / Snooze Function
- Quan soni l'alarma, premeu Sun/Zzz Icon (Snooze) button to activate the snooze function. The alarm will temporarily stop and ring again after a set interval (e.g., 5-10 minutes).
- To completely turn off the alarm when it is ringing, press any other button on the back panel (e.g., +/- or Gear Icon).
- To deactivate the alarm mode entirely, you may need to remove and reinsert the batteries, or long-press the Bell Icon button until the alarm symbol disappears from the display. (Refer to Video 1 for specific deactivation steps).
3.4 Ajust de la brillantor de la pantalla
Premeu el botó Sun/Zzz Icon (Brightness/Snooze) button to cycle through different brightness levels for the LED display. This allows you to adjust the display to your preference, especially for night use.
3.5 Date and Temperature Display
The clock automatically cycles through time, date, and temperature displays. To manually cycle through these displays, press the Gear Icon (Set) botó breument.
4. Manteniment
- Clean the clock with a soft, dry cloth. Avoid using abrasive cleaners or solvents.
- Mantingueu el rellotge allunyat de la llum solar directa, de temperatures extremes i d'alta humitat.
- If using battery power, replace batteries promptly when the display becomes dim or unresponsive to ensure accurate timekeeping and alarm function.
- Ensure the USB cable is securely connected when using plug-in power.
5. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| Display is off in battery mode. | This is normal behavior to conserve battery power. | Gently touch the clock or use voice control to wake the display. For continuous display, use USB plug-in power. |
| L'alarma no sona. | Alarm not set or deactivated; low battery power. | Ensure the alarm is correctly set and the alarm symbol is visible on the display. Replace batteries if using battery power. |
| Hora/data incorrecta. | Time/date not set correctly; power interruption. | Follow the "Setting the Time" instructions to reset. Ensure batteries are installed for backup during power interruptions. |
| Els botons no responen. | Temporary software glitch; very low battery. | Remove and reinsert batteries, or disconnect and reconnect USB power to reset the device. Replace batteries if needed. |
6. Especificacions
- Marca: JUSTUP
- Model: HL-8891 / HL-8891A
- Tipus de visualització: LED digital
- Color: Negre
- Dimensions: 4.5" (amplada) x 6.7" (alçada)
- Pes: Aproximadament 0.31 kg (10.8 unces)
- Font d'alimentació: USB (Corded Electric) or 3 x AAA Batteries (not included)
- Material: Acrylonitrile Butadiene Styrene (ABS), Metal (Frame: ABS, Iron)
- Característiques especials: Loud Alarm, Snooze, Night Light, Temperature Display, Date Display, Silent Operation, 12/24 Hour Format.
7. Garantia i Suport
For warranty information or technical support, please refer to the product packaging or contact the retailer where the product was purchased. You may also visit the official JUSTUP weblloc per obtenir més ajuda.
Fabricant: JUSTUP
Data de primera disponibilitat: 10 de maig de 2024





