RIENOK Rienok S4
RIENOK Bluetooth Speaker User Manual
Model: Rienok S4
Introduction
Thank you for choosing the RIENOK Bluetooth Speaker. This portable, waterproof speaker is designed to deliver high-quality audio with versatile connectivity and durable construction. Please read this manual carefully to ensure proper use and maintenance of your device.

The RIENOK Bluetooth Speaker, showcasing its waterproof design with water splashing around it.
What's in the Box
Please check the package contents upon unboxing:
- Bluetooth Speaker
- Charger Cable
- AUX Cable
- User Manual

Image showing the RIENOK Bluetooth Speaker, its packaging, charger cable, AUX cable, and user manual.
Setup
Charging the Speaker
Before first use, fully charge the speaker. Connect the provided charger cable to the speaker's charging port and a compatible USB power source. The LED indicator will show charging status.
The speaker has a built-in 2400mAh rechargeable battery, providing approximately 6-10 hours of playtime. Actual playtime may vary based on volume level, lighting effects, and music type.
Power On/Off
- To power on: Press and hold the Power button until the indicator light turns on.
- To power off: Press and hold the Power button until the indicator light turns off.
Bluetooth Pairing
The speaker features advanced Bluetooth 5.3 for stable and efficient wireless connection.
- Ensure the speaker is powered on and in Bluetooth pairing mode (indicator light flashing).
- On your device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "Rienok S4" from the list of devices.
- Once connected, the speaker will emit a confirmation tone, and the indicator light will become solid.

The speaker connecting to a smartphone via Bluetooth 5.3, showing a stable and wider wireless range.
True Wireless Stereo (TWS) Pairing
For an immersive surround sound experience, you can pair two RIENOK S4 speakers together. This feature is only available in Bluetooth mode.
- Turn on both RIENOK S4 speakers.
- Ensure both speakers are not connected to any mobile phone or other Bluetooth devices.
- Choose one of the speakers to be the primary speaker. Press its Play button. It will enter the search state after hearing a prompt tone.
- Turn on the second speaker. It will be in Bluetooth waiting for connection status and will automatically connect without any operation. After the connection is successful, the indicator light of the main speaker flashes, and the other indicator light is always on.

A visual guide demonstrating the four steps to pair two speakers for True Wireless Stereo sound.
Operating Instructions
Controls
The speaker features intuitive buttons for easy control:
- Power Button: Power On/Off.
- Play/Pause Button: Play/Pause music, Answer/End calls.
- Volume Up (+): Increase volume, Next track (long press).
- Volume Down (-): Decrease volume, Previous track (long press).
- Mode Button (O): Switch between Bluetooth, TF Card, and AUX modes.
Music Playback
- Press the Play/Pause button to play or pause music.
- Long press the '+' button for the next track.
- Long press the '-' button for the previous track.
- Short press '+' or '-' to adjust volume.
Hands-Free Calling
With the built-in microphone, you can answer calls directly through the speaker when connected via Bluetooth.
- To answer an incoming call: Short press the Play/Pause button.
- To end a call: Short press the Play/Pause button during a call.
- To reject an incoming call: Long press the Play/Pause button.
RGB Lights
The speaker features colorful RGB lights that enhance the music experience by changing color and rhythm to adapt to various music types.
- The lights automatically activate with music playback.
- Specific controls for light modes may be available via the Mode button or a dedicated light button (refer to quick start guide for exact functionality).
Other Connectivity Options
- TF Card: Insert a TF (Micro SD) card into the designated slot to play music directly from the card.
- AUX Input: Use the provided AUX cable to connect the speaker to devices without Bluetooth capability.
Maintenance
Waterproof Feature (IPX7)
The RIENOK speaker is IPX7 waterproof, meaning it can be submerged in water up to 1 meter for 30 minutes. It is resistant to rain, dust, snow, mud, sand, and spills.

The speaker being held over water, demonstrating its IPX7 waterproof capability.
Important: Ensure the charging port and AUX port covers are securely closed before exposing the speaker to water.
Cleaning and Storage
- Clean the speaker with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures.
- If not used for extended periods, charge the speaker at least once every three months to maintain battery health.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not power on. | Low battery. | Charge the speaker fully. |
| Cannot pair with Bluetooth device. | Speaker not in pairing mode; Device Bluetooth off; Too far from speaker; Already connected to another device. | Ensure speaker is in pairing mode (flashing light). Turn on Bluetooth on your device. Move device closer to speaker. Disconnect from other devices. |
| No sound. | Volume too low; Incorrect input mode; Device not playing audio. | Increase speaker and device volume. Press Mode button to select correct input (Bluetooth, TF, AUX). Ensure audio is playing on your device. |
| TWS pairing fails. | Speakers already connected to other devices; Not the same model. | Ensure both speakers are disconnected from all other Bluetooth devices. Confirm both speakers are RIENOK S4 models. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | Rienok S4 |
| Product Dimensions | 10.4 x 10.9 x 17 cm |
| Weight | 650 g |
| Battery | 1 Lithium Ion (2400mAh) |
| Playtime | 6-10 Hours (varies with volume, lighting, music type) |
| Connectivity Technology | Bluetooth 5.3, Auxiliary, TF Card |
| Speaker Maximum Output Power | 5 Watts |
| Audio Output Mode | Stereo |
| Waterproof Rating | IPX7 |
| Special Features | Bluetooth, Waterproof, Stereo Pairing (TWS), RGB Lights |
Warranty and Support
The RIENOK Bluetooth Speaker comes with a standard manufacturer's warranty. For specific warranty terms and conditions, please refer to the documentation included with your purchase or contact the seller directly.
For technical support, troubleshooting assistance, or any inquiries regarding your RIENOK product, please reach out to the customer service provided by your retailer or the official RIENOK support channels.
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