1. Introduction
This manual provides detailed instructions for the operation and maintenance of your Retekess V115 and TR112 Digital Shortwave Radios. These portable multi-band receivers offer a wide range of features including AM, FM, SW, AIR, VHF, and WB reception, Bluetooth connectivity, TF card MP3 playback, and recording capabilities. The TR112 model also features APP intelligent remote control.
Image 1.1: The Retekess V115 (right) and TR112 (left) digital shortwave radios. The V115 is black with a digital display and numeric keypad, while the TR112 is green with a larger digital display and a manual tuning wheel.
Image 1.2: The Retekess TR112 radio with an antenna extended, showing icons for AIR, FM, MW, SW, VHF, and WB bands, indicating its multi-band reception capabilities.
2. Package Contents
Please check the package for the following items:
- Retekess V115 / TR112 Digital Shortwave Radio
- USB Charging Cable
- Hand Strap with Bracket
- User Manual (this document)
Note: A T-Flash/microSD card (max 32GB) is required for recording and MP3 playback but is not included in the package.
3. Product Overview
Familiarize yourself with the radio's controls and ports.
3.1 Retekess V115 Controls (Example)
- POWER Button: Turns the radio on/off.
- MODE Button: Switches between radio bands (FM/AM/SW) and other modes (MP3, Bluetooth).
- Numeric Keypad (0-9): Direct frequency input, song selection.
- VOL+/VOL- Buttons: Adjusts volume.
- REC Button: Initiates recording.
- TF Card Slot: For microSD card insertion.
- USB Charging Port: For charging the internal battery.
- Headphone Jack (3.5mm): For private listening.
3.2 Retekess TR112 Controls (Example)
- POWER/SLEEP Button: Turns the radio on/off, activates sleep timer.
- BAND/TIME SET Button: Switches radio bands (FM/AM/SW/AIR/VHF/WB), sets time.
- Manual Tune Wheel: For fine-tuning frequencies.
- VOL+/VOL- Buttons: Adjusts volume.
- STEP/EQ Button: Adjusts tuning step, cycles through EQ modes.
- MOD/0-X Button: Changes modulation, enters numeric values.
- TUNE+/TUNE- Buttons: Scans frequencies up/down.
- SOS Button: Activates emergency alarm.
- USB Charging Port: For charging the internal battery.
- Headphone Jack (3.5mm): For private listening.
4. Setup
4.1 Charging the Battery
The radio is equipped with a 1000mAh rechargeable lithium battery (V115) or 1600mAh battery (TR112). Before first use, fully charge the battery.
- Connect the supplied USB charging cable to the radio's Micro USB interface (DC 5V input).
- Connect the other end of the USB cable to a standard USB power adapter (not included) or a computer's USB port.
- The charging indicator light will illuminate. It typically takes 3-4 hours for a full charge (TR112).
- Once fully charged, disconnect the charging cable.
Image 4.1: The Retekess TR112 radio's Micro USB charging port. The image also indicates a 1600mAh battery with 8-10 hours working time and 3-4 hours charging time.
4.2 Inserting a TF Card (for V115/TR112)
To use the recording function or MP3 player, a T-Flash/microSD card (up to 32GB) must be inserted.
- Locate the TF card slot on the side or bottom of your radio.
- Gently insert the TF card with the metal contacts facing down until it clicks into place.
- To remove, push the card in slightly until it springs out.
5. Operating Instructions
5.1 Power On/Off
Press and hold the POWER button (V115) or POWER/SLEEP button (TR112) to turn the radio on or off.
5.2 Band Selection
Press the MODE button (V115) or BAND/TIME SET button (TR112) repeatedly to cycle through available radio bands: FM, AM, SW (Shortwave), AIR (TR112 only), VHF (TR112 only), WB (Weather Band, TR112 only).
Image 5.1: The Retekess V115 radio, emphasizing its AM/FM/SW band options, preset station capabilities, and support for automatic/manual search and storage of radio stations.
5.3 Tuning Methods
The radios support multiple tuning methods:
- Digital Tuning (V115): Directly enter the frequency using the numeric keypad.
- Manual Tuning: Use the TUNE+/TUNE- buttons (V115/TR112) or the Manual Tune Wheel (TR112) to adjust the frequency step by step.
- Automatic Search: Press and hold the TUNE+/TUNE- buttons to automatically scan and stop at the next strong station.
- Wheel Search (TR112): Rotate the manual tune wheel for continuous frequency scanning.
Image 5.2: The Retekess TR112 radio, illustrating various tuning methods including digital tuning, manual tuning, and wheel search, with visual cues of radio waves.
5.4 Presetting Radio Stations
The radio can store up to 100 radio presets.
- Tune to the desired station.
- Press the MEMO button (V115) or refer to the manual for TR112 specific storage instructions.
- Select a memory location using the numeric keypad or tuning buttons.
- Press MEMO again to confirm.
5.5 Recording Function (V115/TR112)
A TF card is required for recording. The radio supports three recording modes:
- MIC Recording: Records audio through the built-in microphone.
- Line-in Recording: Records audio from an external source connected via the AUX input.
- Radio Recording: Records the currently playing radio station.
To initiate recording, press the REC button (V115) or follow TR112 specific instructions. You can select recording quality: 64 kbps (simple), 96 kbps (quality), 128 kbps (super).
Image 5.3: The Retekess V115 radio illustrating its recording function, highlighting the three modes: MIC recording, AUX cable input recording, and Radio recording. A TF card is required.
5.6 MP3 Playback (V115/TR112)
The radio can play MP3/WMA format music stored on a TF card.
- Ensure a TF card with music files is inserted.
- Switch to MP3 mode (usually by pressing the MODE button).
- Use the playback controls (play/pause, next/previous track) to navigate your music.
- Repeat modes include All, One, or Folder.
5.7 Bluetooth Connectivity (V115/TR112)
To connect your radio to a Bluetooth device:
- Switch the radio to Bluetooth mode (usually indicated by 'BT' on the display).
- Enable Bluetooth on your external device (e.g., smartphone).
- Search for available devices and select 'Retekess V115' or 'Retekess TR112' to pair.
- Once connected, audio from your device will play through the radio.
5.8 APP Control (TR112 only)
The Retekess TR112 supports intelligent remote control via a dedicated mobile application (Android, Harmony OS, iOS).
- Download the Retekess APP from your device's app store.
- Ensure Bluetooth is enabled on your smartphone and the TR112 radio.
- Open the APP and follow the on-screen instructions to connect to your TR112 radio.
- The APP allows for frequency band switching, mode switching, digital keyboard frequency selection, volume adjustment, and frequency channel selection.
Image 5.4: The Retekess TR112 radio shown alongside a smartphone displaying the radio's APP control interface, indicating support for Android, Harmony OS, and iOS.
5.9 SOS Alarm Function (TR112 only)
The TR112 features an SOS alarm for emergency situations, which also supports flashlight lighting.
- Press the SOS button to activate the emergency alarm.
- The radio will emit a loud alarm sound and activate a flashing light.
- Press the SOS button again to deactivate.
Image 5.5: The Retekess TR112 radio with its SOS alarm function activated, showing a red flashing light and an audible alarm graphic, indicating emergency functionality and flashlight support.
5.10 Sleep Timer (V115/TR112)
The sleep timer allows the radio to automatically shut off after a specified period.
- While the radio is on, press the POWER/SLEEP button (TR112) or refer to V115 manual for sleep timer activation.
- Use the tuning buttons to set the desired time (e.g., 00-05...85-90 minutes).
- Confirm the setting. The radio will turn off automatically after the set time.
5.11 EQ Modes (V115/TR112)
The radio offers 6 EQ modes to adjust the audio output.
- Press the EQ button (V115) or STEP/EQ button (TR112) to cycle through the available equalizer presets.
Image 5.6: The Retekess V115 radio, highlighting its bass diaphragm speaker designed to produce clear and loud sound.
5.12 Language Settings (V115/TR112)
The radio supports multiple display languages.
- Access the system settings menu (refer to specific model instructions).
- Select 'Language' and choose from Chinese, English, or Spanish. The default language is English.
5.13 AM Tuning Increment (V115/TR112)
The AM tuning increment can be set to 9KHz or 10KHz.
- Access the system settings menu.
- Locate the 'AM Tuning Increment' option.
- Select either 9KHz or 10KHz. The default is 10KHz.
6. 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 or subjecting the radio to strong impacts.
- When not in use for extended periods, store the radio in a cool, dry place and charge it periodically to maintain battery health.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Radio does not power on. | Battery is depleted. | Charge the radio fully. |
| Poor radio reception. | Weak signal, antenna not extended. | Extend the telescopic antenna fully. Try repositioning the radio. For SW, reception can vary greatly with time of day and atmospheric conditions. |
| Cannot record or play MP3s. | No TF card inserted or card is full/corrupted. | Insert a formatted TF card. Check card capacity and format. |
| Bluetooth connection fails. | Radio not in Bluetooth mode, device too far, or pairing issue. | Ensure radio is in Bluetooth mode. Bring devices closer. Delete previous pairing and re-pair. |
| APP control not working (TR112). | Bluetooth not connected, APP not installed, or software glitch. | Ensure Bluetooth is active and connected. Reinstall the APP. Restart both radio and smartphone. |
8. Specifications
- Brand: Retekess
- Model: V115 / TR112
- Radio Bands Supported: AM, FM, SW (V115); AM, FM, SW, AIR, VHF, WB (TR112)
- Tuner Technology: Digital DSP
- Connectivity Technology: Bluetooth, USB
- Power Source: Battery Powered (Rechargeable Lithium Battery)
- Battery Capacity: 1000mAh (V115), 1600mAh (TR112)
- Charging Input: DC 5V, Micro USB interface
- Power Output: 2W
- Product Dimensions (V115): 4.73"L x 3.15"W x 0.9"H
- TF Card Support: Max 32GB (not included)
- Recording Quality: 64 kbps, 96 kbps, 128 kbps selectable
- Sleep Timer: 00-90 minutes
- Languages: Chinese, English, Spanish
- AM Tuning Increment: 9KHz/10KHz selectable (default 10KHz)
9. Warranty and Support
For warranty information and technical support, please refer to the official Retekess website or contact their customer service directly. Keep your purchase receipt as proof of purchase.
Manufacturer: Retekess
FCC ID (TR112): 2A3NOTR112
For further assistance, visit the Retekess Store on Amazon.
