Introduction
The Acer OHR688 Wireless Headset is designed for clear communication and comfort in various work environments, including office, call center, and remote work. Featuring AI & ENC dual noise-canceling microphone technology, it effectively filters out background noise for crystal-clear calls. With Bluetooth 5.3 and a versatile USB dongle, it offers stable dual connectivity across multiple devices. The headset is engineered for all-day wearing comfort with ultra-soft memory foam ear pads and an adjustable, lightweight design. Its extended battery life ensures reliable performance throughout your work week.
What's in the Box
- 1x Wireless Headset with Mic for Work
- 1x USB A/C Dongle
- 1x USB-C Cable
- 1x User Manual
Setup Instructions
- Charging the Headset: Connect the provided USB-C cable to the headset's charging port and the other end to a USB power source. A full charge takes approximately 2 hours. The headset provides up to 45 hours of talk time on a single charge.
- Power On/Off: Locate the power button on the headset. Press and hold to power on or off.
- Connecting via USB Dongle (2.4G Mode):
Insert the USB A/C dongle into an available USB-A or USB-C port on your computer (laptop, desktop). The headset will automatically connect to the dongle. Ensure the headset is switched to 2.4G mode using the mode switch button.

Image: The Acer OHR688 headset connected to a laptop via the USB dongle, illustrating the 2.4G connection mode.
- Connecting via Bluetooth (BT Mode):
Ensure the headset is switched to BT mode using the mode switch button. On your device (smartphone, tablet, PC), enable Bluetooth and search for "Acer OHR688". Select the headset to pair. The headset supports multipoint connection, allowing seamless switching between two paired devices.

Image: The Acer OHR688 headset connected to a smartphone via Bluetooth, illustrating the BT connection mode.
Operating Instructions
- Volume Control: Use the volume up (+) and volume down (-) buttons located on the earcup to adjust audio levels.
- Mute/Unmute Microphone: Press the dedicated mute button on the microphone arm to mute or unmute your voice during calls. A voice prompt will confirm the mute status.
- Microphone Adjustment: The microphone arm is flexible and can be rotated 180 degrees to position it optimally for your voice or to move it out of the way when not in use. It can also be worn on either the left or right side.
- Answering/Ending Calls: Use the multi-function button (often the power button or a dedicated call button) to answer or end calls. Refer to the detailed user manual for specific button functions.
- Switching Between Devices (Multipoint Connection): If connected to two devices (e.g., PC via dongle and phone via Bluetooth), the headset can seamlessly switch audio input between them. For example, if you are on a video call on your PC and receive a phone call, you can answer the phone call directly from the headset.

Image: Visual guide for managing calls and meetings across multiple connected devices.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the headset. Avoid using harsh chemicals or abrasive materials.
- Ear Pad Replacement: The ear pads are designed to be replaceable. To remove, gently twist and pull off the cushion. Align the new cushion's clips with the earcup slots and turn clockwise until secure.
- Storage: Store the headset in a cool, dry place away from direct sunlight and extreme temperatures. Use the provided soft pouch for protection when traveling or not in use.

Image: Instructions for replacing the ear pads, showing twist to unlock, pull off, align & turn on, and lock in place steps.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No audio/Cannot connect | Headset not powered on; Out of range; Not paired; Incorrect mode (BT/2.4G) | Ensure headset is powered on. Move closer to the device. Re-pair the headset. Switch to the correct connection mode. |
| Poor audio quality/Static | Interference; Low battery; Device volume too low/high | Move away from other wireless devices. Charge the headset. Adjust volume on both headset and connected device. |
| Microphone not working | Microphone muted; Incorrect input device selected on computer | Unmute the microphone. Check audio settings on your computer/device and select the headset as the input device. |
Specifications
- Brand: Acer
- Model Number: OHR688
- Connectivity: Bluetooth 5.3, 2.4G Wireless (via USB Dongle)
- Wireless Range: Up to 49 feet (15m)
- Battery Life: Up to 45 hours talk time
- Charging Time: Approximately 2 hours
- Weight: 3.53 ounces (approx. 100g)
- Noise Control: AI & Environmental Noise Cancellation (ENC)
- Ear Placement: On Ear
- Control Type: Button Control (Power, Volume, Mute)
- Compatible Devices: Windows, macOS, Linux, Laptops, Desktops, Phones, Tablets
Warranty & Support
The Acer OHR688 Wireless Headset comes with a 1-year limited warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. For warranty claims, technical support, or further assistance, please refer to the contact information provided in the full user manual included in your product packaging or visit the official Acer support website.