Introduction
The SENTRY Over the Ear Wireless Active Noise Cancellation Headphones are premium noise cancelling headphones with up to -20dB of Noise Cancellation. They feature Bluetooth 5.3, audio control buttons, and an integrated microphone for easy access and communication. These headphones require no app for use and are designed for easy Bluetooth pairing. Enjoy up to 22 hours of playtime with Active Noise Cancellation enabled. Their flat folding design ensures easy storage and portability.

Image: SENTRY White Over Ear Bluetooth Headphones, showcasing their sleek design.
What's in the Box
- SENTRY White Over Ear Bluetooth Headphones
- USB-C Charging Cable
- Auxiliary Audio Cable (if included)
- Carrying Pouch (if included)

Image: The retail packaging for SENTRY White Over Ear Bluetooth Headphones, highlighting key features and the product itself.
Product Features
- Active Noise Cancellation: Reduces ambient noise by up to -20dB for an isolated listening experience.
- Wireless Connectivity: Bluetooth V5.3 for seamless audio streaming up to 30 feet.
- Wired Audio Option: Includes an auxiliary port for continued listening with a wired connection.
- Long Battery Life: Up to 22 hours of playtime with Active Noise Cancellation from a 400mAh battery.
- Integrated Controls: On-ear buttons for volume adjustment, track skipping, and call management.
- Built-in Microphone: Enables clear phone calls.
- Comfortable Design: Ultra-plush over-ear cups and an adjustable headband for a snug, fatigue-free fit.
- Compact & Portable: Bi-folding design allows for easy storage and travel.
Setup
Charging the Headphones
- Locate the USB-C charging port on the headphones.
- Connect the included USB-C charging cable to the headphone's port.
- Plug the other end of the USB-C cable into a compatible USB power source (e.g., wall adapter, computer USB port).
- The indicator light will illuminate during charging and turn off or change color when fully charged. A full charge typically takes approximately three hours.
Bluetooth Pairing
- Ensure the headphones are powered off.
- Press and hold the power button for approximately 5-7 seconds until the indicator light flashes rapidly (usually blue and red), indicating pairing mode.
- On your audio device (smartphone, tablet, laptop), enable Bluetooth.
- Search for available Bluetooth devices and select 'SENTRY OSH-1000WH' from the list.
- Once successfully paired, the indicator light on the headphones will typically show a steady blue light or flash slowly.
Wired Connection
For a wired audio experience, or if the headphone battery is depleted, use the auxiliary audio cable:
- Plug one end of the auxiliary cable into the 3.5mm audio jack on the headphones.
- Plug the other end of the auxiliary cable into the 3.5mm audio output jack of your audio device.
- Audio will now play through the headphones via the wired connection.
Operating Instructions
Power On/Off
- To Power On: Press and hold the power button for approximately 3 seconds until the indicator light illuminates.
- To Power Off: Press and hold the power button for approximately 3 seconds until the indicator light turns off.
Volume Control
- Volume Up: Press the '+' button.
- Volume Down: Press the '-' button.
Music Playback Control
- Play/Pause: Press the multi-function button (often the power button or a dedicated play/pause button) once.
- Next Track: Double-press the multi-function button.
- Previous Track: Triple-press the multi-function button.
Call Management
- Answer/End Call: Press the multi-function button once.
- Reject Call: Press and hold the multi-function button for approximately 2 seconds.
Active Noise Cancellation (ANC)
- Locate the dedicated ANC button (if available, refer to product diagram).
- Press the ANC button once to toggle the Active Noise Cancellation feature on or off.

Image: A person comfortably wearing the SENTRY White Over Ear Bluetooth Headphones, demonstrating their ergonomic design.
Maintenance
- Cleaning: Use a soft, dry cloth to wipe the ear cups, headband, and exterior surfaces of the headphones. Avoid using abrasive cleaners, solvents, or harsh chemicals.
- Storage: When not in use, store the headphones in the provided carrying pouch to protect them from dust, scratches, and minor impacts. The bi-folding design allows for compact storage.
- Battery Care: To prolong battery life, avoid fully discharging the headphones frequently. Charge them regularly, even if not used for extended periods.
- Avoid Moisture: Keep the headphones away from water, excessive humidity, and extreme temperatures.
Troubleshooting
- No Power: Ensure the headphones are fully charged. Connect them to a power source using the USB-C cable and allow sufficient time for charging.
- Cannot Pair via Bluetooth:
- Make sure the headphones are in pairing mode (indicator light flashing rapidly).
- Ensure your device's Bluetooth is enabled and within the effective range (up to 30 feet).
- If previously paired, try 'forgetting' the headphones from your device's Bluetooth settings and then re-pairing.
- Restart both the headphones and your audio device.
- No Sound:
- Check the volume levels on both the headphones and your connected audio device.
- Ensure the headphones are properly paired via Bluetooth or the auxiliary cable is securely connected.
- If using Bluetooth, try disconnecting and reconnecting.
- Active Noise Cancellation (ANC) Not Effective:
- Ensure the ANC feature is activated (check the ANC button).
- ANC is most effective at reducing consistent low-frequency sounds. Some ambient sounds, especially human voices or sudden sharp noises, may not be completely eliminated.
Specifications
| Brand | SENTRY |
| Model Number | OSH-1000WH |
| Ear Placement | Over Ear |
| Noise Control | Active Noise Cancellation (-20dB) |
| Bluetooth Version | 5.3 |
| Bluetooth Range | 9 Meters (approx. 30 feet) |
| Battery Average Life | 22 Hours (with ANC) |
| Battery Charge Time | 3 Hours |
| Connectivity Technology | Bluetooth, Wired (3.5mm Jack) |
| Control Type | Volume Control, Mute Toggle |
| Additional Features | Adjustable Headband, Detachable Cable, Foldable |
| Material | Plastic |
| Item Weight | 9.2 Grams |
Warranty and Support
SENTRY Industries provides a 90-Day Guarantee on all products. This warranty covers defective or damaged products, offering free replacement within 90 days of purchase.
For customer support, please contact SENTRY Industries directly. Their customer support line is operated from their New York office to ensure you receive the assistance you need.
For further assistance or inquiries, please refer to the contact information provided in your product packaging or visit the official SENTRY website.

