1. Introduction
The TECSUN M-301 is a versatile mini portable device combining an FM radio receiver, Bluetooth music player, and audio recorder. Its slim and lightweight design makes it ideal for on-the-go use, offering multiple functions including computer speaker capability and hands-free Bluetooth calls. This manual provides detailed instructions to help you get the most out of your M-301.
2. Package Contents
Please check the package for the following items:
- 1 x TECSUN M-301 Radio Unit
- 1 x Stereo Earphone
- 1 x USB Charger Cable
3. Setup
3.1 Charging the Device
- Connect the supplied USB charger cable to the Micro USB port on the M-301.
- Connect the other end of the USB cable to a USB power adapter (5V, ≥500mA, not included) or a computer's USB port.
- The device has a built-in lithium battery. The display will show the remaining electric quantity.
3.2 Inserting a TF Card
- Locate the TF card slot on the side of the M-301.
- Gently insert a TF (MicroSD) card (up to 128GB maximum support) into the slot until it clicks into place.
- Ensure the card is inserted correctly to avoid damage.
3.3 Connecting Headphones
- Plug the stereo earphones into the 3.5mm headphone jack on the side of the M-301.
4. Operating Instructions
4.1 Basic Controls
The M-301 features intuitive buttons for power, mode selection, volume control, and tuning. Refer to the device's front panel for button identification.
4.2 FM Radio Operation
- Frequency Range: The M-301 supports FM frequencies from 64-108MHz (settable). This range can be adjusted for different regions (e.g., 64-108MHz for Russia/Caucasus, 76-108MHz for Japan, 87-108MHz for China/Europe, 88-108MHz for Europe/Australia).
- Tuning: Use the tuning buttons to scan for stations.
- Storing Frequencies: The device can store up to 100 FM frequencies. Use the shortcut keys for favorite programs to quickly access saved stations.
4.3 Bluetooth Music Player
- Pairing: Switch the M-301 to Bluetooth mode. On your mobile device, search for "TECSUN M-301" and pair.
- Hands-Free Calls: Once paired, the M-301 supports mobile phone hands-free functionality.
4.4 TF Card Music Playback
- Insert a TF card with music files.
- The M-301 can play 16bit/44.1k FLAC, WAV, WMA, APE, and MP3 format music files.
- It supports breakpoint resume, allowing you to continue playback from where you left off.
4.5 Audio Recording Functions
The M-301 offers three recording methods:
- Broadcast Recording: Records FM radio broadcasts in mono WAV format.
- Bluetooth Audio Recording: Records audio received via Bluetooth in stereo MP3 format.
- Microphone Recording: Uses the built-in microphone for general audio recording (e.g., meetings, interviews, foreign language learning) in mono WAV format.
4.6 Computer Speaker Function
Connect the M-301 to your computer via the USB cable to use it as an external speaker.
4.7 Multi-function Display
The display provides useful information including:
- Remaining battery level
- Current radio frequency
- Time
- Temperature
- Other working status indicators
4.8 Automatic Power On & Sleep Shutdown
- Automatic Power On: The device features an automatic power-on function.
- Sleep Shutdown: You can set the device to automatically shut down after 1-120 minutes of operation. This function can also be canceled.
5. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the device. Do not use liquid cleaners or solvents.
- Battery Care: To prolong battery life, avoid fully discharging the battery frequently. Charge the device regularly, even if not in use for extended periods.
- Storage: Store the M-301 in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity.
- Avoid Impact: Protect the device from drops and impacts, which can damage internal components.
6. Troubleshooting
- Device won't turn on: Ensure the battery is charged. Connect to a power source and try again.
- No sound: Check the volume level. Ensure headphones are properly connected or Bluetooth is paired correctly.
- Poor FM reception: Extend the antenna (if applicable) or try moving to a different location.
- Bluetooth pairing issues: Ensure the M-301 is in Bluetooth mode and discoverable. Turn off and on Bluetooth on both devices and try pairing again.
- TF card not recognized: Ensure the TF card is inserted correctly and is not damaged. Check if the card's format is compatible.
7. Specifications
| Feature | Specification |
|---|---|
| Brand Name | Tecsun |
| Model Number | M-301 |
| Dimensions (WxHxD) | 62 x 125 x 13mm |
| Net Weight | Approx. 92g |
| Body Material | Plastic |
| FM Frequency Range | 64-108MHz (settable) |
| FM Noise Limit Sensitivity | Better than 3μV (S/N=30dB) |
| FM Selectivity | Better than 60dB |
| Storeable Frequencies | 100pcs |
| Bluetooth Version | Up to 5.0 |
| Supported Audio Formats | 16bit/44.1k FLAC, WAV, APE, WMA, MP3 |
| TF Card Support | Max 128GB |
| Recording Format (FM & Mic) | Mono WAV |
| Recording Format (Bluetooth) | Stereo MP3 |
| Speaker | Diameter 45mm, 16Ω, 0.5W |
| Stereo Headphone Impedance | 32-150Ω |
| Power Supply | Rechargeable Battery Pack, External DC Micro USB 5V, ≥500mA |
| Maximum Working Current | 260mA |
| Quiescent Current (FM) | <50mA |
| Standby Current | <100uA |
| Screen | Yes |
| WIFI | No |
| Certification | CE |
8. User Tips
- Regional FM Settings: If you are in a region with a specific FM frequency range (e.g., Japan or Russia), ensure you adjust the settable FM range in the device settings for optimal reception.
- Maximize Recording Storage: For extensive recording, consider using a high-capacity TF card, up to the supported 128GB.
- Portability: The M-301's compact size makes it highly portable. Utilize its small form factor for travel, outdoor activities, or simply moving it between rooms.
- Battery Life: To conserve battery, use headphones when private listening is desired, as the built-in speaker consumes more power.
9. Warranty and Support
For warranty information and technical support, please refer to the official Tecsun website or contact your retailer. Keep your purchase receipt as proof of purchase.