YETHKE Bluetooth 5.4 Car Adapter with Retractable Charger (Model PT-42) Instruction Manual

1. Introduction

This manual provides detailed instructions for the YETHKE Bluetooth 5.4 Car Adapter with Retractable Charger, Model PT-42. This device integrates multiple functions including Bluetooth audio streaming, FM transmission, hands-free calling, and multi-device fast charging with retractable cables. Please read this manual thoroughly before use to ensure proper operation and safety.

YETHKE Bluetooth Car Adapter plugged into a car's cigarette lighter socket, displaying 'VOLTAGE 13.7' on its screen.

Image 1.1: YETHKE Bluetooth Car Adapter (Model PT-42) in use.

2. Safety Information

Ensure the device is securely plugged into the car's cigarette lighter socket.
Do not expose the device to extreme temperatures, moisture, or direct sunlight.
Avoid disassembling or modifying the device, as this may void the warranty and pose safety risks.
Keep the device away from children.
Monitor the car battery voltage display to prevent battery drain. An alarm will sound if voltage drops below 11.5V.

3. Product Overview and Features

The YETHKE PT-42 is designed for convenience and efficiency in your vehicle. Key features include:

Upgraded Bluetooth 5.4: Provides faster pairing, stronger anti-interference, improved sound quality, and lower power consumption compared to Bluetooth 5.3.
4-in-1 Fast Charging: Equipped with a 30W PD Type-C retractable cable, a 12W Apple retractable cable, a 15W USB-C port, and a 12W USB-A port, offering a total output of 69W.
Retractable Cables: Two built-in cables (Type-C and Apple Lightning) extend up to 80cm (31.5 inches) for convenient use and retract for a tidy interior.
FM Transmitter: Allows audio streaming from your device to your car's radio.
Hands-Free Calling: Integrated controls for answering, rejecting, and ending calls.
Real-time Voltage Display: Monitors your vehicle's battery voltage.
180° Adjustable Design: Allows for flexible positioning to fit various car interiors.
Wide Compatibility: Supports iPhone 12-17 series, Samsung S23-S24 series, iPad series, Switch, and other USB-C/USB-A devices. Compatible with most 12-24V vehicles (Cars, SUVs, RVs, Trucks).

Overview of YETHKE Bluetooth 5.4 Retractable Car Charger highlighting its features like 69W high power, Bluetooth 5.4, retractable cables, and Hi-Fi stereo music.

Image 3.1: Overview of product features.

Diagram illustrating the benefits of Bluetooth 5.4 over previous versions, showing 200% faster connection, 200% stable transmission, 100% noise suppression, and 100% energy consumption efficiency.

Image 3.2: Bluetooth 5.4 technology advantages.

4. Setup Instructions

4.1. Initial Connection

Insert the YETHKE Car Adapter into your vehicle's 12V-24V cigarette lighter socket. The device will power on and display the current car battery voltage.
Tune your car radio to an empty FM channel (one with no static or broadcast).
On the YETHKE adapter, long press the 'M' button (middle button) for 5 seconds to enter FM mode. Use the 'Previous Song' and 'Next Song' buttons to adjust the adapter's FM frequency to match your car radio's empty channel.

4.2. Bluetooth Pairing

Once the FM frequency is set, the adapter will automatically enter Bluetooth pairing mode. The display will show 'BT'.
On your mobile device, enable Bluetooth and search for available devices. Select 'PT-42' from the list to connect.
A voice prompt will confirm successful pairing. The device will automatically reconnect to your phone in the future.

Three-step visual guide for setting up the YETHKE car adapter: 1. Tune car radio to a blank FM channel. 2. Long press the adapter's middle button to match FM frequency. 3. Search and connect to 'PT-42' via Bluetooth on your phone.

Image 4.1: Step-by-step setup for FM and Bluetooth connection.

5. Operating Instructions

5.1. Charging Devices

The adapter offers multiple charging options:

Retractable Cables: Pull out the integrated Type-C (PD 30W) or Apple Lightning (12W) cables to charge compatible devices. To retract, gently pull the cable out an additional 1cm and release.
USB-C Port: Use your own USB-C cable to connect and charge devices via the 15W USB-C port.
USB-A Port: Use your own USB-A cable to connect and charge devices via the 12W USB-A port.

Image showing the YETHKE 4-in-1 car charger simultaneously charging four devices: two via retractable cables (PD 30W USB-C and 12W Apple Lightning), one via a 15W USB-C port, and one via a 12W USB-A port.

Image 5.1: Multiple device charging capability.

Diagram showing how to retract the cables: pull and hold the cable gently, extend 1cm more, then release for automatic retraction. An illustration shows the cable extending up to 80cm.

Image 5.2: Retractable cable operation.

5.2. Music Playback

After successful Bluetooth pairing, music from your mobile device will stream through your car's FM radio.
Use the 'Previous Song' and 'Next Song' buttons on the adapter to control track selection.
The middle button can be used for Play/Pause.

5.3. Hands-Free Calling

When a call comes in, press the phone icon button on the adapter to answer.
Press the phone icon button again to end the call.
Long press the phone icon button to reject an incoming call.

Image showing a driver using the YETHKE car adapter for hands-free calls, with call and music control buttons highlighted on the device.

Image 5.3: Hands-free operation controls.

5.4. Voltage Display

The LED display on the adapter shows your car's real-time battery voltage. This helps you monitor the health of your vehicle's battery. If the voltage drops below 11.5V, an alarm will sound, indicating a potential issue or excessive power draw.

Image showing the YETHKE car adapter's digital display indicating 'VOLTAGE 13.7V' and emphasizing real-time battery voltage monitoring for safety and tidiness.

Image 5.4: Real-time battery voltage monitoring.

6. Maintenance

Keep the device clean by wiping it with a dry, soft cloth.
Avoid using harsh chemicals or abrasive cleaners.
Ensure the retractable cables are free from obstructions to prevent damage during retraction.

7. Troubleshooting

Problem	Possible Cause	Solution
No power/display off	Loose connection; car socket issue	Ensure the adapter is firmly plugged in. Check if the car's cigarette lighter socket is functional.
Cannot pair via Bluetooth	Bluetooth not enabled; device too far; interference	Ensure Bluetooth is enabled on your phone. Keep phone close to the adapter. Restart both devices.
Static/Poor FM audio quality	FM frequency interference	Find a clearer, unused FM frequency on your car radio and match the adapter's frequency.
Slow charging	Cable not fully extended; device not fast-charge compatible	Ensure retractable cables are fully extended. Verify your device supports fast charging protocols (PD/QC).
Cables not retracting smoothly	Obstruction; improper retraction technique	Check for any physical obstructions. Gently pull the cable out an additional 1cm and release to activate the retraction mechanism.

8. Specifications

Model Number: PT-42
Brand: YETHKE
Bluetooth Version: 5.4
Input Voltage: 12-24V
Total Output Power: 69W Max
Retractable Cable 1 (Type-C): PD 30W
Retractable Cable 2 (Apple Lightning): 12W
USB-C Port: 15W
USB-A Port: 12W
Retractable Cable Length: Up to 80cm (31.5 inches)
Special Features: Bluetooth 5.4, Fast Charging, Multi-Device Charging, Retractable Cable, Short Circuit Protection, Battery Voltage Detection
Material: Metal
Color: Gray
Item Weight: 5.9 ounces
Package Dimensions: 6.81 x 2.68 x 1.54 inches

Diagram showing the dimensions of the YETHKE car adapter: 2.6 inches height, 1.3 inches width, 2.2 inches depth for the main body, and 2.1 inches length, 0.79 inches diameter for the cigarette lighter plug.

Image 8.1: Product dimensions.

9. What's in the Box

1 x YETHKE Bluetooth Car Adapter with Retractable Charger

10. Warranty and Support

For warranty information and customer support, please refer to the product packaging or contact YETHKE customer service directly. Keep your purchase receipt for any warranty claims.

YETHKE PT-42