1. Introduction
Thank you for choosing the i-Star Digital Alarm Clock. This manual provides essential information for setting up, operating, and maintaining your new alarm clock. Please read it thoroughly before use and retain it for future reference.

Image 1.1: The i-Star Digital Alarm Clock, showcasing its clear display of time and temperature.
2. Safety Information
- Do not expose the device to water or excessive moisture.
- Avoid placing the device near heat sources or in direct sunlight.
- Use only the specified power adapter or batteries.
- Do not attempt to disassemble or repair the device yourself. Refer all servicing to qualified personnel.
- Keep out of reach of children.
3. Package Contents
Please check that all items are present:
- i-Star Digital Alarm Clock
- USB Power Cable
- User Manual (this document)
4. Product Features
The i-Star Digital Alarm Clock offers a range of features designed for convenience and functionality:
- Digital Time Display: Clear and easy-to-read LED display.
- Multiple Alarms: Set up to 3 independent alarms with customizable activation days (5, 6, or 7 days a week).
- Snooze Function: Allows for extra sleep after the alarm sounds.
- Temperature Display: Shows ambient temperature in Celsius (°C) or Fahrenheit (°F).
- Calendar Display: View the current date.
- 12/24 Hour Format: Switch between standard and military time.
- Dual Power Options: Operates via USB power cable or 3x AAA batteries (not supplied).

Image 4.1: Visual representation of the clock's main features.
5. Setup
5.1 Powering the Device
The i-Star Digital Alarm Clock can be powered in two ways:
- USB Power: Connect the provided USB cable to the clock's power input and plug the other end into a USB power adapter (not supplied) or a powered USB port. This is the recommended primary power source.
- Battery Power: For portability or backup, insert 3x AAA batteries (not supplied) into the battery compartment. Note that battery power may dim the display to conserve energy.

Image 5.1: The alarm clock can be powered by a USB cable or AAA batteries.
5.2 Initial Time and Date Setting
Upon first power-up or after a power reset, you may need to set the correct time and date. Refer to the 'Operating Instructions' section for detailed steps.
6. Operating Instructions
The clock typically features buttons for 'SET', 'UP', 'DOWN', and 'ALARM' or similar. Specific button functions may vary slightly, but the general process is as follows:
6.1 Setting the Time and Date
- Press and hold the SET button until the display flashes, indicating time setting mode.
- Use the UP and DOWN buttons to adjust the hour. Press SET to confirm.
- Repeat the process for minutes, year, month, and day.
- Press SET again to exit the setting mode.
6.2 Setting Alarms
The clock supports up to 3 alarms (AL1, AL2, AL3).
- Press the ALARM button repeatedly to cycle through AL1, AL2, AL3, and alarm off.
- When an alarm (e.g., AL1) is displayed, press and hold the ALARM button until the alarm time flashes.
- Use UP and DOWN to set the alarm hour, then press ALARM to confirm.
- Repeat for alarm minutes.
- Next, set the alarm activation days (e.g., 5 days for weekdays, 6 days for weekdays + Saturday, 7 days for everyday). Use UP and DOWN, then press ALARM to confirm.
- To activate or deactivate an alarm, press the ALARM button briefly when the desired alarm is displayed. An indicator (e.g., 'AL1' icon) will appear or disappear.

Image 6.1: The clock supports multiple alarms for flexible scheduling.
6.3 Snooze Function
When an alarm sounds, press any button (often the 'SNOOZE' or 'SET' button) to activate the snooze function. The alarm will temporarily stop and sound again after a set interval (e.g., 5-10 minutes).
6.4 Temperature Display
The clock displays the ambient temperature. To switch between Celsius (°C) and Fahrenheit (°F), locate the dedicated temperature button or use a combination of existing buttons (e.g., press and hold DOWN in normal time display mode).

Image 6.2: The clock displays both time and temperature, with options for Celsius or Fahrenheit.
6.5 12/24 Hour Format
To switch between 12-hour (with AM/PM indicator) and 24-hour formats, press the UP button in normal time display mode, or refer to the specific button combination in your clock's quick start guide.
7. 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 dims or functions become erratic. Ensure correct polarity.
- Storage: If storing the clock for an extended period, remove the batteries to prevent leakage.
8. Troubleshooting
- Display is blank:
- Ensure the USB power cable is securely connected to a working power source.
- If using batteries, check if they are inserted correctly and are not depleted. Replace if necessary.
- Alarm does not sound:
- Verify that the alarm is activated (check for the alarm icon on the display).
- Ensure the alarm time is set correctly.
- Incorrect time/date:
- Follow the 'Setting the Time and Date' instructions to reset.
- Temperature reading seems inaccurate:
- Ensure the clock is not placed near a direct heat source or in direct sunlight, which can affect readings.
9. Specifications
| Feature | Detail |
|---|---|
| Brand | i-Star |
| Model | B09R1X3Q58 |
| Dimensions | 15.8 x 9.7 x 9.09 cm |
| Weight | 322 g |
| Display Type | Digital |
| Power Source | Electric Cable (USB), 3x AAA Batteries (not supplied) |
| Special Features | Alarm, Snooze, Calendar Display, Temperature Display |
10. Warranty and Support
This i-Star product is covered by a standard manufacturer's warranty. For detailed warranty information, technical support, or service inquiries, please refer to the warranty card included with your purchase or visit the official i-Star website. Please have your model number (B09R1X3Q58) ready when contacting support.





