1. Introduction
Thank you for purchasing the HRD-903 Portable AM/FM Digital Radio. This compact and versatile device is designed for convenient listening on the go, featuring dual-band reception, a backlit LCD display, and multiple functions including an alarm clock and sleep timer. Please read this manual thoroughly before use and keep it for future reference.
2. Package Contents
Ensure all items are present in the package:
- 1 x HRD-903 Mini Pocket FM AM Radio
- 1 x Charging Cable
- 1 x Instruction Manual
3. Setup
3.1 Battery Installation
- Locate the battery compartment cover on the back of the radio.
- Slide the cover downwards to open the compartment.
- Insert three (3) AA batteries (1.5V each, not included) according to the polarity markings (+/-) inside the compartment.
- Close the battery compartment cover by sliding it back into place until it clicks securely.
3.2 External Power Connection
For extended use, the radio can be powered via a DC 5V power source (e.g., a USB wall adapter or power bank) using the provided charging cable. Connect the cable to the DC-5V port on the side of the radio.
3.3 Antenna Adjustment
Extend the telescopic antenna fully for optimal FM reception. For AM reception, the radio uses an internal ferrite bar antenna, so orienting the radio itself may improve signal quality.
4. Operating Instructions
4.1 Power On/Off
Press the POWER button located on the top right of the radio to turn it on or off.
4.2 Band Selection
Press the AM/FM button to switch between FM and AM radio bands.
4.3 Tuning
- Manual Tuning: Use the TUNING knob on the side of the radio to manually scan for stations.
- Automatic Scan: Press the SCAN button to automatically search for and store available radio stations. The radio can store up to 58 stations (29 FM and 29 AM).
4.4 Volume Control
Adjust the listening volume using the VOLUME knob on the right side of the radio.
4.5 Memory Functions
Use the M+, M-, MEMO, and DEL buttons to manage your stored radio stations. Refer to the on-screen prompts for specific operations like saving or deleting presets.
4.6 Clock, Alarm, and Sleep Timer
The radio features a built-in clock, alarm, and sleep timer. Use the corresponding buttons (e.g., SLEEP) and on-screen menu to set these functions. The LCD screen with backlight ensures easy visibility of the time and settings.
5. Maintenance
- Keep the radio dry. Avoid exposure to water or high humidity.
- Clean the radio with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Avoid dropping the radio or subjecting it to strong impacts.
- When not in use for extended periods, remove the batteries to prevent leakage.
- Store the radio in a cool, dry place away from direct sunlight and extreme temperatures.
6. Troubleshooting
- No Power:
- Check if batteries are correctly installed and not depleted.
- Ensure the external DC 5V power source is connected properly and functioning.
- Poor Reception/Static:
- Extend the telescopic antenna fully for FM.
- Rotate the radio for better AM reception.
- Move to an open area away from large metal objects or electronic devices that may cause interference.
- No Sound:
- Increase the volume.
- Ensure headphones are not plugged in if you intend to use the built-in speaker.
7. Specifications
| Feature | Specification |
|---|---|
| Model | HRD-903 |
| Brand | ALLOYSEED |
| Reception Range FM1 | 64-108MHz |
| Reception Range FM2 | 87-108MHz |
| Reception Range AM | 520-1710KHz |
| Receiving Sensitivity FM | ≤8dB |
| Receiving Sensitivity AM | 86dB |
| Static Current | ≤6uA |
| Maximum Current | ≤200mA |
| Speaker | φ40mm / 8Ω / 1W |
| Signal-to-Noise Ratio FM | ≥40dB |
| Signal-to-Noise Ratio AM | ≥33dB |
| Headphone Output Power | 10mW |
| Number of Radio Stations | 58 (29 FM / 29 AM) |
| Minimum Working Voltage | 2.5V |
| External Input Voltage | DC 5.0V |
| Battery | 3 x AA (1.5V each, not included) |
| External Earphone | φ3.5mm / 32Ω x 2 (not included) |
| Product Size | 125 x 60 x 25 mm (4.92 x 2.36 x 0.98 inch) |
| Gross Weight | 170g |
8. User Tips
- For the best audio experience, ensure the radio is placed on a stable surface to minimize vibrations.
- When using the radio outdoors, consider using headphones (not included) for personal listening and to conserve battery life.
- The radio's clear sound and high-quality speaker are designed for an enjoyable listening experience.
- Its powerful compatibility allows it to receive a wide range of channels, making it versatile for various locations.
- Always carry spare AA batteries for uninterrupted use during outdoor activities or emergencies.
9. Frequently Asked Questions (FAQ)
- Q: Can I use rechargeable AA batteries with this radio?
- A: Yes, rechargeable AA batteries can be used. However, the radio does not charge them internally; you will need an external charger.
- Q: Does the radio have a headphone jack?
- A: Yes, the radio is equipped with a φ3.5mm headphone jack for private listening.
- Q: How do I set the alarm?
- A: Refer to the on-screen menu and use the control buttons to navigate to the alarm settings. Follow the prompts to set the time and activate the alarm function.
10. Warranty and Support
For any questions, technical support, or warranty inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.
