1. Product Overview
The KLIM Cassette Player Boombox is a versatile audio device combining classic cassette playback with modern features like AM/FM radio, Bluetooth connectivity, and USB playback/recording. Its portable design allows for use at home or on the go.
Key Features:
- Cassette Player and Recorder
- AM/FM Radio Tuner
- Bluetooth Connectivity for wireless streaming
- USB Port for MP3 playback and recording
- Integrated Microphone for direct recording
- Headphone Jack for private listening
- Dual Power: AC power cord or 4 x C-type batteries (not included)
- Portable design with a carrying handle
What's in the Box:
- KLIM Cassette Player Boombox
- AC Power Cord
- User Manual

Figure 1: Front view of the KLIM Cassette Player Boombox, showcasing its controls and cassette compartment.
2. Setup
Powering the Device:
The KLIM Cassette Player Boombox can be powered in two ways:
- AC Power: Connect the included AC power cord to the device's power input and then to a standard wall outlet.
- Battery Power: For portable use, insert 4 x C-type batteries (not included) into the battery compartment located on the underside of the device. Ensure correct polarity.

Figure 2: Underside view showing the battery compartment for portable power.
3. Operating Instructions
3.1. Cassette Player/Recorder
- Slide the function selector to 'TAPE'.
- Press the 'OPEN' button to open the cassette compartment.
- Insert a cassette tape with the open side facing up.
- Close the cassette compartment.
- Use the 'PLAY', 'STOP/EJECT', 'FFWD' (Fast Forward), and 'REW' (Rewind) buttons to control playback.
- To record, ensure a blank tape is inserted. Press the 'REC' button to start recording from the built-in microphone, radio, or USB.

Figure 3: Top view of the boombox with a cassette tape inserted into the compartment.
3.2. AM/FM Radio
- Slide the function selector to 'RADIO'.
- Extend the telescopic antenna for optimal reception.
- Use the 'BAND' switch to select between AM and FM frequencies.
- Rotate the 'TUNING' knob to find your desired radio station.
3.3. Bluetooth Connectivity
- Slide the function selector to 'BT' (Bluetooth).
- The device will enter pairing mode, indicated by a flashing light or audible prompt.
- On your smartphone or tablet, enable Bluetooth and search for available devices.
- Select 'KLIM Cassette Player' (or similar name) from the list to pair.
- Once paired, you can stream audio wirelessly from your device.
3.4. USB Playback and Recording
- Slide the function selector to 'USB'.
- Insert a USB flash drive containing MP3 audio files into the USB port.
- The device will automatically begin playing the audio files. Use the playback controls (play/pause, skip) to navigate.
- To record to USB, ensure a USB drive is inserted. Press the 'REC' button while in radio or cassette mode to record the audio source directly to the USB drive.

Figure 4: Side view highlighting the USB port for media playback and recording.
3.5. Headphone Use
Connect standard 3.5mm headphones to the headphone jack for private listening. The internal speakers will automatically mute when headphones are connected.
Video 1: Instructions on how to record a tape to USB using the WTB-795 model. This video demonstrates the USB recording functionality.
Video 2: Overview of a retro cassette player with USB, Bluetooth, and AM/FM radio features, similar to the KLIM Cassette Player Boombox.
4. Maintenance
- Keep the device clean by wiping it with a soft, dry cloth. Avoid using liquid cleaners or solvents.
- Regularly clean the cassette head and pinch rollers with a cotton swab lightly dampened with isopropyl alcohol to ensure optimal sound quality and prevent tape damage.
- Keep the device away from direct sunlight, heat sources, and excessive dust or moisture.
- When not in use for extended periods, remove batteries to prevent leakage.
5. Troubleshooting
| Problem | Possible Solution |
|---|---|
| No power | Check if the AC power cord is securely connected. If using batteries, ensure they are inserted correctly and are not depleted. |
| No sound from speakers | Increase the volume. Ensure headphones are not connected. Check the function selector is in the correct mode (TAPE, RADIO, BT, USB). |
| Poor radio reception | Extend the telescopic antenna fully. Adjust the antenna direction. Try moving the unit to a different location. |
| Cassette tape not playing/recording | Ensure the tape is inserted correctly. Check if the tape is damaged. Clean the cassette head and pinch rollers. |
| Bluetooth not connecting | Ensure the unit is in Bluetooth mode. Make sure your device's Bluetooth is enabled and within range. Try unpairing and re-pairing the device. |
| USB playback issues | Ensure the USB drive is formatted correctly (FAT32) and contains compatible audio files (MP3, WAV, WMA, AAC, FLAC). Try a different USB drive. |
6. Specifications
- Brand: KLIM
- Model: Cassette Player
- Product Dimensions: 25 x 13.1 x 7.6 cm
- Item Weight: 1 kg
- Compatible Devices: MP3 Player, Smartphone, Tablet
- Audio Output Mode: Stereo
- Supported Audio Formats: Cassette, Analog Radio, MP3, WAV, WMA, AAC, FLAC, Bluetooth
- Power Source: Corded Electric (AC) / 4 x C-type Batteries (not included)
- Connectivity Technology: USB, Bluetooth
- Color: Frost White
- Item Number: KLSIN4825
7. Warranty & Support
The KLIM Cassette Player Boombox comes with a 5-year warranty. For any questions, technical assistance, or warranty claims, please contact KLIM customer support. Our team is available 24/7 to assist you.
Please refer to the contact information provided in your product packaging or visit the official KLIM website for further details.





