1. Introduction
This manual provides essential information for the safe and efficient operation of your ohyes Bluetooth Speaker. Please read this manual thoroughly before using the product and retain it for future reference.
2. Safety Information
- Ensure the speaker is used with compatible DeWALT 20v Max (including 20-60v Flexvolt) batteries only.
- Do not expose the speaker to water or excessive moisture as it is not water-resistant.
- Avoid extreme temperatures.
- Do not attempt to disassemble or modify the speaker.
- Keep out of reach of children.
- The speaker features low-voltage protection and will automatically power off if the battery voltage drops below 15.5V to prevent damage.
3. Package Contents
Verify that all items are present in your package:
- ohyes Bluetooth Speaker (Model ZX0988)
- User Manual
4. Product Overview and Features
The ohyes Bluetooth Speaker is designed for portability and robust sound, powered by your existing DeWALT 20v Max batteries. It offers versatile audio playback and device charging capabilities.
Key Features:
- Battery Compatibility: Works with DeWALT 20v Max and 20-60v Flexvolt batteries.
- Low-Voltage Protection: Automatically powers off if battery voltage drops below 15.5V.
- Bluetooth 5.3: Ensures rapid and stable wireless connection up to 52 feet.
- USB Audio Playback: Play music directly from a USB flash drive.
- TWS Function: Connect two ohyes Bluetooth speakers for an enhanced stereo sound experience.
- Powerful Sound: Features a 20W built-in speaker for clear audio with zero distortion.
- Dual Charging Ports: Includes USB-A and USB-C (5V/2A fast charging) ports to charge external devices.
- Portable Design: Compact and lightweight for easy transport.
Controls and Ports:
The speaker features intuitive controls on its top panel and charging ports on the rear.

Image: Top view of the ohyes Bluetooth Speaker showing the control panel with power, volume, Bluetooth, and play/pause buttons.
- Power Button: Press and hold to power on/off. Short press to play/pause.
- Volume Up (+): Increase volume.
- Volume Down (-): Decrease volume.
- Previous Track (<<): Go to the previous song.
- Next Track (>>): Go to the next song.
- Bluetooth Button: Press to enter pairing mode.
- USB-A Port: For charging external devices and USB audio input.
- USB-C Port: For fast charging external devices.
5. Setup
5.1 Inserting the Battery
- Align your compatible DeWALT 20v Max battery with the battery slot on the bottom of the speaker.
- Slide the battery firmly into place until it clicks, indicating a secure connection.

Image: The ohyes Bluetooth Speaker with a DeWALT 20V MAX battery attached, illustrating how the battery slides into the speaker base.
5.2 Powering On/Off
- To power on, press and hold the Power Button (circle icon) on the top panel until the indicator light illuminates.
- To power off, press and hold the Power Button again until the indicator light turns off.
5.3 Bluetooth Pairing
- Ensure the speaker is powered on. The Bluetooth indicator light will flash, indicating it's in pairing mode.
- On your mobile device (smartphone, tablet, etc.), enable Bluetooth and search for available devices.
- Select "OHYES ZX0988" from the list of devices.
- Once connected, the Bluetooth indicator light on the speaker will stop flashing and remain solid.
Video: This video demonstrates the ohyes Bluetooth Speaker's features, including its compatibility with DeWALT 20v batteries, sound quality, and the process of connecting to a mobile device via Bluetooth.
5.4 TWS (True Wireless Stereo) Pairing (Optional)
To achieve a stereo sound experience, you can pair two ohyes Bluetooth Speakers together:
- Ensure both speakers are powered on and not connected to any other Bluetooth device.
- On one speaker (this will be the primary speaker), press and hold the Bluetooth Button until you hear a pairing tone.
- On the second speaker, press the Bluetooth Button once.
- The two speakers will automatically connect to each other. Once connected, the primary speaker's Bluetooth indicator will flash, and the secondary speaker's indicator will be solid.
- Now, connect your mobile device to the primary speaker via Bluetooth as described in Section 5.3.

Image: Two ohyes Bluetooth Speakers shown in an outdoor setting, illustrating the TWS dual-pairing function for stereo sound.
6. Operating Instructions
6.1 Playing Audio via Bluetooth
- Once paired with your device, start playing audio from your device.
- Use the Volume Up (+) and Volume Down (-) buttons on the speaker or your device to adjust the volume.
- Use the Previous Track (<<) and Next Track (>>) buttons to navigate your playlist.
- Press the Power Button (circle icon) to play or pause the audio.
6.2 Playing Audio via USB Disk
- Insert a USB flash drive containing audio files into the USB-A port on the rear of the speaker.
- The speaker will automatically detect the USB disk and begin playing audio.
- Use the volume and track control buttons as described for Bluetooth audio.
6.3 Charging External Devices
The speaker can act as a power bank for your mobile devices:
- Connect your device's charging cable to either the USB-A or USB-C port on the rear of the speaker.
- Ensure the speaker is powered on.
- Your device will begin charging. The USB-C port supports 5V/2A fast charging.

Image: The ohyes Bluetooth Speaker with a smartphone connected via USB-C, demonstrating its dual charging port capability.
7. Maintenance
- Clean the speaker with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Store the speaker in a cool, dry place when not in use.
- Remove the DeWALT battery when the speaker is not in use for extended periods to prevent battery drain.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not power on. | Battery is not inserted correctly or is depleted. | Ensure the battery is securely attached and charged. |
| Cannot pair via Bluetooth. | Speaker is not in pairing mode or too far from device. | Ensure Bluetooth indicator is flashing. Move device closer to speaker. Disconnect from other devices. |
| No sound or low volume. | Volume is too low on speaker or device; device not connected. | Increase volume on both speaker and device. Verify Bluetooth connection. |
| External device not charging. | Speaker is off; cable is faulty; battery is depleted. | Ensure speaker is on. Try a different cable. Check battery level. |
| TWS pairing fails. | Speakers are too far apart or already connected to other devices. | Ensure speakers are close and not connected to other devices before TWS pairing. |
9. Specifications
| Feature | Detail |
|---|---|
| Model Name | Battery Powered Speaker |
| Item Model Number | ZX0988 |
| Brand | ohyes |
| Mounting Type | Plug Mount |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Speaker Type | Soundbar |
| Special Feature | Bass Boost, Lightweight, Portable, USB Port |
| Compatible Devices | Laptop, Smartphone, Tablet |
| Surround Sound Channel Configuration | 1.0 |
| Product Dimensions | 4.7"D x 3.6"W x 3.9"H |
| Item Weight | 8.8 ounces (250 Grams) |
| Is Waterproof | FALSE (Not Water Resistant) |
| Maximum Bluetooth Range | 52 Feet |
| Control Method | App (via Bluetooth connected device) |
| Wireless Communication Technology | Bluetooth |
| Speaker Size | 4 Inches |
| Power Source | Battery Powered (DeWALT 20v Max compatible) |
| Audio Driver Type | Dynamic Driver |
| Speaker Maximum Output Power | 20 Watts |
| Connectivity Technology | Bluetooth, USB |
| Audio Output Mode | Stereo (with TWS pairing) |
| Input Voltage | 20 Volts |
10. Warranty and Support
The ohyes Bluetooth Speaker comes with a 12-month warranty. For any product issues or support inquiries, please contact customer service.
Disclaimer: This product is not an original DEWALT item.