1. Product Overview
The LENRUE TouchGo F4 is a compact, portable Bluetooth speaker designed for clear audio and ease of use. It features touch controls, Bluetooth 5.0 connectivity, and supports TWS (True Wireless Stereo) pairing for an enhanced audio experience. The speaker comes with a hard EVA travel case for protection and portability.

Figure 1: LENRUE TouchGo F4 Bluetooth Speaker.
2. Package Contents
Please check the package for the following items:
- LENRUE TouchGo F4 Bluetooth Speaker
- Hard EVA Travel Case
- TYPE-C Charging Cable
- User Manual
3. Setup
3.1 Initial Charging
Before first use, fully charge the speaker. Connect the provided TYPE-C charging cable to the speaker's charging port and a compatible USB power adapter (not included). The charging indicator light will show the charging status. A full charge typically takes approximately 4 hours.
3.2 Powering On/Off
- To Power On: Press and hold the power button (usually the central play/pause button) for a few seconds until you hear an audible prompt and the indicator light illuminates.
- To Power Off: Press and hold the power button again for a few seconds until you hear an audible prompt and the indicator light turns off.
3.3 Bluetooth Pairing
To connect the speaker to your device:
- Ensure the speaker is powered on and in pairing mode (the indicator light will typically flash blue).
- On your device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "ToughGo" or "LENRUE TouchGo" from the list of devices.
- Once connected, you will hear a confirmation sound, and the indicator light will turn solid blue.
The speaker will automatically reconnect to the last paired device when powered on, if the device is within range and Bluetooth is enabled.

Figure 2: Speaker with touch controls for sensitive and elegant operation.
3.4 TWS Wireless Pairing (Connect Two Speakers)
To achieve dual-channel stereo sound, you can pair two TouchGo F4 speakers together:
- Power on both TouchGo F4 speakers.
- Ensure both speakers are disconnected from any other Bluetooth devices.
- On one of the speakers, press and hold the "+" button until you hear a prompt indicating TWS pairing mode.
- The two speakers will automatically pair with each other. You will hear a "beep" sound upon successful TWS pairing.
- Now, connect your device's Bluetooth to the device name "ToughGo". Both speakers will play audio in stereo.

Figure 3: Two speakers connected for TWS wireless stereo pairing.
4. Operating Instructions
4.1 Touch Controls
The speaker features intuitive touch controls located on the top surface:
- Play/Pause: Tap the central button once to play or pause music.
- Volume Up: Tap the "+" button to increase volume.
- Volume Down: Tap the "-" button to decrease volume.
- Next Track: Tap the ">>" button to skip to the next song.
- Previous Track: Tap the "<<" button to go to the previous song.
4.2 Hands-Free Calling
The speaker includes a built-in microphone for hands-free calls:
- Answer Call: When a call comes in, tap the central button once to answer.
- End Call: During a call, tap the central button once to end the call.
- Reject Call: Press and hold the central button for approximately 2 seconds to reject an incoming call.

Figure 4: Speaker with hands-free calling capability.
4.3 Battery Life and Power Saving
The speaker is equipped with a 1200mAh lithium-ion battery, providing 6-15 hours of music playback at 2/3 volume. To conserve power, the speaker will automatically shut down if Bluetooth is disconnected for 30 minutes.
5. Maintenance
5.1 Cleaning
To clean the speaker, use a soft, dry cloth. Do not use abrasive cleaners, solvents, or immerse the speaker in water.
5.2 Storage
When not in use for extended periods, store the speaker in its hard EVA travel case in a cool, dry place. Avoid extreme temperatures and direct sunlight.

Figure 5: Speaker with its protective hard EVA travel case.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not turn on. | Low battery; Power button not pressed correctly. | Charge the speaker fully; Press and hold the power button for a few seconds. |
| Cannot pair with Bluetooth device. | Speaker not in pairing mode; Device Bluetooth off; Speaker already connected to another device. | Ensure speaker is in pairing mode (flashing blue light); Turn on Bluetooth on your device; Disconnect from other devices and try again. |
| Poor sound quality / Muffled sound. | Speaker placement; Obstructions; Low volume. | Ensure the speaker is placed on a flat, open surface, ideally not directly on its bottom where the speaker grille is located. Try placing it on its side for clearer sound. Remove any obstructions; Adjust volume on both speaker and device. |
| TWS pairing fails. | Speakers already paired to a device; Incorrect pairing procedure. | Ensure both speakers are disconnected from any Bluetooth devices before initiating TWS pairing. Follow the TWS pairing steps precisely. |
| No sound. | Volume too low; Paused playback; Device not connected. | Increase volume on both speaker and device; Press play; Verify Bluetooth connection. |
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | F4 |
| Connectivity Technology | Bluetooth 5.0 |
| Speaker Maximum Output Power | 5 Watts |
| Power Source | Battery Powered (1 Lithium Ion battery included) |
| Battery Capacity | 1200mAh |
| Playtime | 6-15 hours (at 2/3 volume) |
| Charging Time | Approximately 4 hours |
| Control Method | Touch |
| Product Dimensions | 3.15 x 3.15 x 1.18 inches |
| Item Weight | 9 ounces |
| Special Feature | Portable, Hands-Free Calling, TWS Pairing |
8. Warranty and Support
For warranty information and customer support, please refer to the documentation included with your purchase or contact LENRUE customer service directly. Contact details can typically be found on the official LENRUE website or through your retailer.





