1. Important Safety Information
Please read these instructions carefully before using the device and retain them for future reference. Incorrect use may result in electric shock, fire, or other hazards.
- Do not expose this appliance to rain or moisture.
- Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
- Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the appliance.
- Only use attachments/accessories specified by the manufacturer.
- Unplug this appliance during lightning storms or when unused for long periods of time.
- Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way.
- The backup battery (CR-2032, not included) should be replaced by an adult. Keep batteries out of reach of children.
2. Package Contents
Ensure all items are present upon unpacking:
- Roadstar CLR-2477 Digital FM Alarm Clock Radio
- AC Power Adapter (integrated or separate, depending on region)
- User Manual (this document)
3. Product Overview
Familiarize yourself with the main components and controls of your Roadstar CLR-2477.
Front View and Display
The front features a clear, large LCD display with white illuminated digits, showing the current time and alarm status (AL1, AL2).
Top Controls
The top panel houses all operational buttons for tuning, time setting, volume, and alarm control.
- TUNING ▼/▲: Adjusts radio frequency.
- PRESET: Saves and recalls radio stations.
- HOUR / MIN / TIME: Sets the clock time.
- VOLUME -/+: Adjusts audio volume.
- POWER: Turns the unit on/off.
- AL.OFF: Deactivates active alarms.
- AL.1 / AL.2: Sets and activates Alarm 1 and Alarm 2.
- SNOOZE / SLEEP: Activates snooze function or sets sleep timer.
Rear USB Port
A USB port is located on the rear for charging external devices.
4. Setup
4.1 Power Connection
- Connect the AC power adapter to the DC IN jack on the back of the unit.
- Plug the other end of the adapter into a standard AC wall outlet (230V AC ~ 50Hz).
- The display will light up, indicating the unit is powered.
4.2 Installing the Backup Battery
A CR-2032 lithium battery (not included) can be installed to provide backup power for time and alarm settings during a power outage.
- Locate the battery compartment on the bottom of the unit.
- Open the battery compartment cover.
- Insert one CR-2032 battery, ensuring the correct polarity (+/-).
- Close the battery compartment cover securely.
4.3 Setting the Clock Time
- With the unit powered on, press and hold the TIME button until the hour digits begin to flash.
- Press the HOUR button repeatedly to set the correct hour.
- Press the MIN button repeatedly to set the correct minute.
- Press the TIME button again to confirm and save the setting. The digits will stop flashing.
5. Operating Instructions
5.1 FM Radio Operation
- Press the POWER button to turn on the radio.
- Press the TUNING ▼/▲ buttons to manually tune to your desired FM station. Press and hold for automatic scanning.
- Adjust the volume using the VOLUME -/+ buttons.
Saving and Recalling Presets
- Tune to the desired station.
- Press and hold the PRESET button until a preset number (P01-P20) flashes on the display.
- Use the TUNING ▼/▲ buttons to select the desired preset number.
- Press the PRESET button again to confirm and save the station.
- To recall a saved station, briefly press the PRESET button and then use TUNING ▼/▲ to cycle through the saved presets.
5.2 Setting the Alarms (AL.1 / AL.2)
The unit features two independent alarms.
- Press and hold the AL.1 or AL.2 button until the hour digits for that alarm begin to flash.
- Press the HOUR button repeatedly to set the desired alarm hour.
- Press the MIN button repeatedly to set the desired alarm minute.
- Press the AL.1 or AL.2 button again to confirm the time.
- After setting the time, the display will show options for the alarm source (e.g., "BU" for Buzzer, "RD" for Radio). Use the TUNING ▼/▲ buttons to select your preferred alarm source.
- Press the AL.1 or AL.2 button one more time to confirm the alarm source and activate the alarm. The corresponding alarm indicator (AL1 or AL2) will appear on the display.
Deactivating an Alarm
To turn off an active alarm, press the AL.OFF button. The alarm will be reset for the next day.
5.3 Snooze Function
When an alarm sounds, press the SNOOZE/SLEEP button to temporarily silence it. The alarm will sound again after approximately 9 minutes.
5.4 Sleep Timer
The sleep timer allows the radio to play for a set duration before automatically turning off.
- With the radio playing, press the SNOOZE/SLEEP button repeatedly to cycle through the available sleep timer durations (e.g., 90, 60, 30, 15 minutes, or OFF).
- The selected duration will be displayed briefly. The radio will automatically turn off after the set time.
5.5 USB Charging Port
The USB port on the rear of the unit provides a fast-charging output (1A rating) for compatible devices.
- Connect your mobile phone, tablet, or other USB-powered device to the USB port using a compatible USB cable (not included).
- The device will begin charging. The charging function operates independently of the radio or alarm functions.
6. Maintenance
Proper care ensures the longevity of your device.
- Cleaning: Use a soft, dry cloth to clean the exterior of the unit. Do not use abrasive cleaners, waxes, or solvents.
- Liquids: Keep the unit away from water and other liquids. If liquid spills onto the unit, unplug it immediately and contact qualified service personnel.
- Storage: If the unit is to be stored for an extended period, unplug it from the power outlet and remove the backup battery. Store in a cool, dry place.
7. Troubleshooting
If you encounter issues, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power / Display off | Power cord not connected; Power outlet not active; Power outage. | Ensure power cord is securely plugged in; Check the power outlet with another device; If power outage, backup battery should maintain settings. |
| Alarm does not sound | Alarm not activated; Alarm volume too low; Incorrect alarm time set. | Ensure AL1/AL2 indicator is on; Increase volume; Verify alarm time is correctly set. |
| Poor FM radio reception | Weak signal; Antenna not extended. | Adjust the position of the unit; Fully extend the FM wire antenna (if applicable). |
| USB charging not working | Device not compatible; Cable faulty; Unit not powered. | Ensure device is compatible with 1A charging; Try a different USB cable; Ensure the alarm clock is connected to AC power. |
8. Specifications
Detailed technical specifications for the Roadstar CLR-2477.
Visual representation of the product specifications.
- Model: CLR-2477
- Brand: Roadstar
- Color: Black
- Display Type: LCD (0.6" White Display)
- Radio Tuner: Digital FM
- FM Presets: 20 stations
- Alarms: 2 (Dual Alarm)
- Alarm Sources: Buzzer, FM Radio
- Snooze Function: Yes
- Sleep Timer: Yes (Programmable power off)
- USB Port: Fast Charging (1A Rating)
- Audio Output: 1 speaker, 4W PMPO, 1x0.5W RMS
- Volume Control: Digital
- Power Source: AC 230V ~ 50Hz
- Backup Battery: CR-2032 (not included)
- Dimensions (WxLxH): 156 x 76 x 50 mm
- Weight: 0.21 Kg
9. Warranty and Support
Roadstar products are designed and manufactured to the highest quality standards. This product is covered by a manufacturer's warranty, the terms of which are detailed on the official Roadstar website or in separate warranty documentation provided with your purchase.
For technical support, service, or warranty claims, please refer to the contact information provided on the official Roadstar website or your local distributor's support channels.
Online Support: www.roadstar.com
