1. Introduction
This manual provides detailed instructions for the proper use and maintenance of your Micool DY20PLUS Bluetooth Earpiece. Please read this manual thoroughly before using the product to ensure safe and efficient operation. The Micool DY20PLUS is a single-ear Bluetooth headset designed for clear communication, featuring noise cancellation and extended talk time.

Figure 1: Micool DY20PLUS Bluetooth Earpiece
Video 1: Overview of Micool Bluetooth Headset features, including noise cancellation and long battery life.
2. Package Contents
Please check the package for the following items:
- Micool DY20PLUS Bluetooth Earpiece
- USB Charging Cable
- Ear Hooks (various sizes)
- User Manual
3. Product Overview
Familiarize yourself with the buttons and indicators on your Micool DY20PLUS earpiece:

Figure 2: Earpiece controls and functions.
- MFB (Multi-Function Button): Power on/off, play/pause, answer/end calls.
- Volume Up (+): Increase volume, next track (long press).
- Volume Down (-): Decrease volume, previous track (long press).
- Mute Button: Mute/unmute microphone during a call.
- LED Indicator: Shows power, pairing, and charging status.
- Charging Port: USB port for charging.
4. Setup
4.1 Charging the Earpiece
Before first use, fully charge the earpiece. Connect the provided USB charging cable to the earpiece's charging port and a USB power source. The LED indicator will show charging status and turn off when fully charged. A full charge provides up to 30 hours of talk time.
4.2 Bluetooth Pairing
To connect your Micool DY20PLUS earpiece to your mobile phone or other Bluetooth-enabled device:
- Ensure the earpiece is turned off.
- Press and hold the MFB until the LED indicator flashes red and blue alternately, indicating pairing mode.
- On your device, enable Bluetooth and search for available devices.
- Select "DY20PLUS" from the list of devices.
- Once connected, the LED indicator will flash blue slowly.
The earpiece supports connecting to two devices simultaneously. After pairing with the first device, disable Bluetooth on it, then pair with the second device. Re-enable Bluetooth on the first device, and both should connect.
Video 2: Demonstrates Bluetooth pairing and setting up the "Speak Caller's Name" function using the RealTTS app.
5. Operating Instructions
5.1 Power On/Off
- Power On: Press and hold the MFB for approximately 3 seconds until the LED indicator flashes blue.
- Power Off: Press and hold the MFB for approximately 3 seconds until the LED indicator flashes red and then turns off.
5.2 Call Management
- Answer Call: Short press the MFB once.
- End Call: Short press the MFB once during a call.
- Reject Call: Long press the MFB for 2 seconds.
- Mute/Unmute: Short press the dedicated Mute button during a call.
- Switch Call Audio: During a call, you can switch the audio output between the earpiece and your phone. Refer to your phone's call interface for this option.
5.3 Music Playback
- Play/Pause: Short press the MFB once.
- Next Track: Long press the Volume Up (+) button.
- Previous Track: Long press the Volume Down (-) button.
5.4 Volume Control
- Increase Volume: Short press the Volume Up (+) button.
- Decrease Volume: Short press the Volume Down (-) button.
5.5 Voice Assistant
Double-tap the MFB to activate your device's voice assistant (Siri, Cortana, Bixby, Google Assistant, etc.). This allows for hands-free control of your connected device.
6. Maintenance
- Keep the earpiece dry. Do not expose it to extreme temperatures.
- Clean the earpiece with a soft, dry cloth. Avoid using harsh chemicals.
- Store the earpiece in a cool, dry place when not in use.
- Avoid dropping or subjecting the earpiece to strong impacts.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Cannot power on | Low battery | Charge the earpiece fully. |
| Cannot pair with device | Earpiece not in pairing mode; Bluetooth off on device; too far apart. | Ensure earpiece is in pairing mode (flashing red/blue). Turn on Bluetooth on your device. Keep devices within 1 meter during pairing. |
| No sound or poor sound quality | Volume too low; earpiece not selected as audio output; interference. | Adjust volume on both earpiece and device. Check device's audio output settings. Move away from sources of interference. |
| Caller's name not announced | RealTTS app not installed or permissions not granted. | Download and install the "RealTTS" app. Ensure Bluetooth and contact access permissions are granted to the app. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | DY20PLUS |
| Brand | Micool |
| Bluetooth Version | 5.0 |
| Wireless Range | Up to 50 meters (150 feet) |
| Talk Time | Up to 30 hours |
| Noise Control | Active Noise Cancellation (2 Microphones) |
| Weight | 12g (Ultra-light) |
| Compatibility | Bluetooth-enabled devices (phones, laptops, tablets) |
| Material | Plastic |
| UPC | 768399519588 |
9. Warranty and Support
Micool products come with a standard manufacturer's warranty. For specific warranty details, please refer to the warranty card included in your product packaging or visit the official Micool website. If you encounter any issues or require technical assistance, please contact Micool customer support through their official channels.