1. Product Overview
The ToHayie Bluetooth FM Transmitter is a versatile in-car device designed to enhance your driving experience. It features a large 1.8-inch LCD display, dual USB charging ports, and multiple music playback modes. Enjoy hands-free calling, seamless music streaming, and convenient device charging on the go.

Image 1.1: ToHayie Bluetooth FM Transmitter and its remote control.
2. Product Features
- Large 1.8-inch LCD Display: Clearly shows car battery voltage, caller ID, volume, FM frequency, and song titles.
- Multiple Playback Modes: Supports music playback via Bluetooth, Micro SD card (MP3, WMA, WAV formats), USB flash drive, and 3.5mm AUX audio cable.
- Dual USB Ports & Quick Charging: Two USB ports (5V/2.4A, 5V/1A) for simultaneous charging of two devices. Built-in smart chip automatically adjusts voltage.
- Hands-Free Calling: Equipped with CVC technology for advanced interference and noise cancellation, ensuring clear full-duplex sound.
- Remote Control: Includes a 21-key remote for convenient operation.
- Adjustable Neck: Allows for optimal viewing angle.
- Safety Features: Built-in protection against overload, short-circuit, and over-voltage.
3. Setup Guide
Follow these steps to set up your ToHayie Bluetooth FM Transmitter:
- Plug into Car Cigarette Lighter: Insert the FM transmitter into your car's cigarette lighter socket. The device will power on automatically.
- FM Frequency Pairing:
- Turn on your car's FM radio.
- Find an empty FM frequency on your car radio (one with no static or broadcast).
- Adjust the FM frequency on the transmitter to match the empty frequency on your car radio. Use the FM button and rotary knob on the device.
Video 3.1: Demonstrates plugging in the device and FM frequency pairing.
- Bluetooth Pairing:
- On your mobile device, enable Bluetooth and search for available devices.
- Select "CAR_KIT" from the list to pair. Once connected, the transmitter's display will show "BT Connected".

Image 3.1: The 1.8-inch LCD display provides clear information.
4. Operating Instructions
Once set up, you can begin using your FM transmitter for various functions:
4.1 Music Playback
The transmitter supports four music playback modes:
- Bluetooth: Stream music directly from your paired mobile device. Use the Previous/Next buttons on the transmitter or remote to change tracks.
- USB Disk Playback: Insert a USB flash drive into the designated USB port (USB1/U-disk). The device will automatically detect and play music files.
- TF Card Playback: Insert a Micro SD (TF) card into the TF card slot. The device will automatically detect and play music files.
- AUX Audio Cable: Connect your MP3 player, tablet, or other audio device via a 3.5mm audio cable to the AUX input/output port.

Image 4.1: The transmitter supports various music playback options.
4.2 Hands-Free Calling
When connected via Bluetooth, you can make and receive calls hands-free:
- Answer/Hang Up: Press the "Answer/Play/Volume adjustment/Confirm button/siri" (rotary knob) or the green call button on the remote control to answer an incoming call. Press again to hang up.
- Reject Call: Long press the "Answer/Play/Volume adjustment/Confirm button/siri" or the red hang-up button on the remote control to reject an incoming call.
- Redial: Double-press the "Answer/Play/Volume adjustment/Confirm button/siri" to redial the last number.
- Private Conversation: During a call, press the "Previous/Private talking shift button" to switch the call to your phone for privacy.

Image 4.2: Enjoy clear hands-free calls with CVC technology.
4.3 Voice Assistant (Siri/Google Assistant)
Activate your phone's voice assistant through the transmitter:
- Activation: Long press the "Answer/Play/Volume adjustment/Confirm button/siri" (rotary knob) to activate Siri or Google Assistant on your paired phone.

Image 4.3: Detailed view of the device's controls and ports.
4.4 Remote Control Operation
The included 21-key remote control provides convenient access to various functions:
- Play/Pause: Press the Play/Pause button.
- Volume Adjustment: Use CH+ / CH- buttons for volume.
- Track Navigation: Use Previous / Next buttons for music tracks.
- FM Channel Adjustment: Use the CH+ / CH- buttons to adjust FM frequency.
- EQ Modes: Press the EQ button to cycle through equalizer presets.
- Mode Switch: Press the MODE button to switch between Bluetooth, USB, TF card, and AUX modes.

Image 4.4: The remote control allows for safe and convenient operation while driving.
Video 4.1: Demonstrates music playback, folder selection, Siri activation, and remote control functions.
4.5 USB Charging
The dual USB ports provide power output for charging your mobile devices:
- USB1: 5V/1A output, also functions as a USB disk input for music playback.
- USB2: 5V/2.4A output for faster charging.

Image 4.5: Charge two devices simultaneously using the dual USB ports.
5. Maintenance
To ensure the longevity and optimal performance of your ToHayie Bluetooth FM Transmitter, please follow these maintenance guidelines:
- Keep the device clean by wiping it with a soft, dry cloth. Avoid using harsh chemicals or abrasive cleaners.
- Ensure the cigarette lighter socket and USB ports are free from dust and debris.
- Store the device in a cool, dry place when not in use, away from direct sunlight and extreme temperatures.
- Avoid dropping or subjecting the device to strong impacts.
6. Troubleshooting
If you encounter issues with your FM transmitter, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power/display off | Loose connection; Car cigarette lighter faulty; Blown fuse. | Ensure the device is firmly plugged in. Check car's cigarette lighter fuse. Test in another vehicle if possible. |
| Poor audio quality/static | FM frequency interference; Volume too low; Bluetooth not properly connected. | Find a clearer FM frequency on both the radio and transmitter. Increase volume on both devices. Re-pair Bluetooth. |
| Bluetooth not connecting | Device not in pairing mode; Already connected to another device; Interference. | Ensure Bluetooth is enabled on your phone. Forget "CAR_KIT" from your phone's Bluetooth list and re-pair. Move closer to the device. |
| USB charging not working | Cable issue; Device not compatible; Overload protection. | Try a different USB cable. Ensure your device is compatible with the charging output. Unplug and replug the transmitter. |
7. Specifications
| Feature | Detail |
|---|---|
| Brand Name | ToHayie |
| Item Model Number | BC32RC |
| Product Dimensions | 3.3 x 2 x 4.5 inches |
| Item Weight | 1.76 ounces |
| Connectivity Technology | Bluetooth, Auxiliary, USB |
| Wireless Comm Standard | Bluetooth |
| Power Source Type | Battery Powered (via car cigarette lighter) |
| Batteries | 1 Lithium Metal battery required (included) |
| Output Power | 2.4A + 1A (combined) |
| Frequency Range | 76-108 MHZ |
| Transmitter Distance | 20M |
| Material | Silver |
8. Safety Information
This product has been certified to meet safety standards:
- CE Certification
- FCC Certification
- ROHS Certification
Always operate the device responsibly and in accordance with local traffic laws. Do not attempt to disassemble or modify the device.
9. Warranty and Support
For warranty information or technical support, please contact ToHayie customer service through the retailer where you purchased the product or visit the official ToHayie website. Keep your purchase receipt as proof of purchase.