SENTRY BT985 Wireless Bluetooth Earbuds User Manual
Model: BT985
Introduction
Thank you for purchasing the SENTRY BT985 Wireless Bluetooth Earbuds. This manual provides detailed instructions on how to set up, operate, and maintain your earbuds to ensure optimal performance and longevity. Please read this manual thoroughly before using the product.
Important Safety Information
- Do not expose the earbuds to extreme temperatures, humidity, or corrosive substances.
- Avoid dropping or subjecting the earbuds to strong impacts.
- Do not disassemble or modify the earbuds. This will void the warranty.
- Keep out of reach of children.
- Use only the provided charging cable or a certified equivalent.
- Prolonged listening at high volume levels may cause hearing damage. Adjust volume to a moderate level.
Package Contents
Please check the package for the following items:
- SENTRY BT985 Wireless Bluetooth Earbuds (Left and Right)
- Charging Case
- USB Charging Cable
- User Manual (this document)

Image: The retail packaging for the SENTRY BT985 Wireless Bluetooth Earbuds, displaying the product name, model number, and key features.
Product Overview
Familiarize yourself with the components of your SENTRY BT985 Wireless Bluetooth Earbuds.

Image: A pair of SENTRY BT985 Wireless Bluetooth Earbuds, highlighting their compact and ergonomic design.
Earbuds:
- Multi-function Button (MFB): Located on the outer surface of each earbud, used for power, playback, calls, and voice assistant.
- LED Indicator: Shows pairing status, charging status, and power.
- Microphone: For hands-free calling.
- Charging Contacts: Connects with the charging case for power.
Charging Case:
- Charging Port: USB port for charging the case.
- LED Battery Indicators: Displays the charging status and battery level of the case.
- Earbud Charging Slots: Securely holds and charges the earbuds.

Image: The SENTRY BT985 Wireless Bluetooth Earbuds placed inside their open charging case, with the case's LED battery indicators illuminated.
Setup
1. Charging the Earbuds and Case
Before first use, fully charge both the earbuds and the charging case.
- Place the earbuds into their respective slots in the charging case. Ensure the charging contacts align.
- Connect the USB charging cable to the charging port on the case and the other end to a USB power source (e.g., computer, wall adapter).
- The LED indicators on the charging case will illuminate to show charging status. The earbuds' LEDs will also indicate charging.
- Once fully charged, the indicators will change or turn off. Disconnect the charging cable.
2. Pairing with a Bluetooth Device
The SENTRY BT985 earbuds are designed for easy pairing.
- Initial Pairing:
a. Open the charging case. The earbuds will automatically power on and enter pairing mode. The LED indicator on one earbud will flash rapidly (e.g., blue and red) to indicate it's ready to pair.
b. On your device (smartphone, tablet, etc.), enable Bluetooth.
c. Search for "BT985" in the list of available Bluetooth devices.
d. Select "BT985" to connect. Once connected, the earbud LED will stop flashing or flash slowly (e.g., blue). You will hear a confirmation tone. - Automatic Reconnection:
Once paired, the earbuds will automatically connect to the last paired device when taken out of the charging case, provided Bluetooth is enabled on the device and it is within range. - Single Earbud Use:
Either earbud can be used independently. Simply take one earbud out of the case, and it will automatically enter pairing mode or connect to the last paired device.
Operating Instructions
The Multi-function Button (MFB) on each earbud controls various functions.
Power On/Off
- Power On: Open the charging case, or press and hold the MFB for 3 seconds.
- Power Off: Place the earbuds back into the charging case, or press and hold the MFB for 5 seconds.
Music Playback
- Play/Pause: Single press the MFB on either earbud.
- Next Track: Double press the MFB on the right earbud.
- Previous Track: Double press the MFB on the left earbud.
- Volume Up: Triple press the MFB on the right earbud.
- Volume Down: Triple press the MFB on the left earbud.
Call Management
- Answer/End Call: Single press the MFB on either earbud during an incoming call or during an active call.
- Reject Call: Press and hold the MFB for 2 seconds during an incoming call.
Voice Assistant
- Activate Voice Assistant (Siri, Google Assistant, etc.): Press and hold the MFB for 2 seconds when not on a call or playing music.
Maintenance
Proper care will extend the life of your SENTRY BT985 earbuds.
- Cleaning: Use a soft, dry, lint-free cloth to clean the earbuds and charging case. Do not use harsh chemicals or abrasive materials.
- Storage: When not in use, store the earbuds in their charging case to protect them and keep them charged. Store in a cool, dry place away from direct sunlight.
- Battery Care: To preserve battery life, charge the earbuds and case regularly, even if not used frequently. Avoid fully discharging the battery for extended periods.
Troubleshooting
If you encounter issues with your earbuds, refer to the following common solutions:
| Problem | Possible Cause | Solution |
|---|
| Earbuds do not power on. | Low battery. | Charge the earbuds and charging case fully. |
| Earbuds do not pair with device. | Bluetooth is off on device; earbuds not in pairing mode; device too far. | Ensure Bluetooth is enabled. Place earbuds in case, close, then open to re-enter pairing mode. Move device closer to earbuds. |
| Only one earbud is working. | Earbuds not properly synced; one earbud has low battery. | Place both earbuds back into the charging case, close the lid, then open it again. Ensure both earbuds are charged. |
| Sound is distorted or intermittent. | Interference; device too far; low battery. | Move closer to the paired device. Avoid strong electromagnetic interference. Charge earbuds. |
| Earbuds not charging. | Charging cable or port issue; dirty charging contacts. | Check charging cable and power source. Clean charging contacts on earbuds and case with a dry cotton swab. |
Specifications
| Feature | Detail |
|---|
| Model Name | Sentry BT985 Wireless Bluetooth Earbuds |
| Connectivity Technology | Wireless (Bluetooth) |
| Headphones Jack | USB (for charging case) |
| Included Components | Cable |
| Material | Plastic |
| Control Type | Media Control, Remote |
| Water Resistance Level | Water Resistant |
| Item Weight | 6.5 ounces |
| Product Dimensions | 8 x 5 x 1 inches |
| Manufacturer | Sentry Industries |
| Color | Black |
| Ear Placement | In Ear |
| Form Factor | In Ear |
| Noise Control | Sound Isolation |
Warranty and Support
For warranty information and customer support, please refer to the documentation included with your purchase or visit the official SENTRY website. Keep your proof of purchase for warranty claims.