Introduction
Thank you for choosing the Sennheiser HD 350BT Wireless Foldable Headphones. These headphones offer a superior wireless audio experience, whether you are at home or on the go. Featuring Bluetooth 5.0, advanced codec support, and an impressive 30-hour battery life, the HD 350BT is designed for comfort, durability, and exceptional sound quality. This manual provides comprehensive instructions to help you get the most out of your new headphones.
Safety Information
Please read this safety information carefully before using your headphones. Keep this manual in a safe place for future reference.
- Hearing Protection: Avoid listening at high volume levels for extended periods to prevent hearing damage.
- Traffic Safety: Do not use the headphones in situations where your hearing is critical for safety, such as driving, cycling, or walking in traffic.
- Choking Hazard: Keep the headphones and accessories out of reach of children and pets to prevent accidental ingestion of small parts.
- Environmental Conditions: Do not expose the headphones to extreme temperatures, humidity, or liquids.
- Cleaning: Clean the headphones only with a soft, dry cloth. Do not use cleaning agents or solvents.
Package Contents
Ensure all items are present in your package:
- Sennheiser HD 350BT Wireless Headphones
- USB-C Charging Cable
- Quick Guide
- Safety Guide
Product Overview
Familiarize yourself with the components and controls of your HD 350BT headphones.
Image: The Sennheiser HD 350BT headphones shown in their folded position, highlighting the compact design for portability. The earcups are rotated inwards towards the headband.
Controls and Indicators
- Power Button: Used for powering on/off and Bluetooth pairing.
- Volume Buttons (+/-): Adjusts audio volume.
- Multi-function Button: Controls music playback (play/pause, skip tracks) and call management (answer/end calls).
- Voice Assistant Button: Activates your device's voice assistant (Siri, Google Assistant).
- USB-C Port: For charging the headphones.
- LED Indicator: Displays battery status, pairing status, and charging status.
Setup
1. Charging the Headphones
- Connect the USB-C charging cable to the USB-C port on the headphones.
- Connect the other end of the cable to a USB power source (e.g., wall adapter, computer USB port).
- The LED indicator will show the charging status. A full charge takes approximately 2 hours and provides up to 30 hours of playback.
- Once fully charged, the LED indicator will change, and you can disconnect the cable.
2. Bluetooth Pairing
- Power On: Press and hold the Power button for 2 seconds until you hear an audible prompt and the LED flashes.
- Enter Pairing Mode: With the headphones powered on, press and hold the Power button for 4 seconds until the LED flashes blue and red alternately. This indicates pairing mode.
- Activate Bluetooth on Your Device: Go to the Bluetooth settings on your smartphone, tablet, or computer.
- Select Headphones: From the list of available devices, select "HD 350BT".
- Confirm Pairing: If prompted, confirm the pairing. The LED on the headphones will flash blue a few times, and you will hear a confirmation tone when successfully connected.
3. Sennheiser Smart Control App
For enhanced functionality, download the Sennheiser Smart Control App from your device's app store. The app allows you to:
- Customize sound with an equalizer.
- Activate Podcast Mode for optimized speech clarity.
- Receive firmware updates.
- View battery status.
Operating the Headphones
Image: A person wearing the Sennheiser HD 350BT headphones, demonstrating their comfortable fit during use, while browsing through a collection of vinyl records.
Power On/Off
- Power On: Press and hold the Power button for 2 seconds.
- Power Off: Press and hold the Power button for 2 seconds.
Music Playback
- Play/Pause: Press the Multi-function button once.
- Next Track: Press the Multi-function button twice.
- Previous Track: Press the Multi-function button three times.
- Volume Up: Press the Volume + button.
- Volume Down: Press the Volume - button.
Call Management
- Answer/End Call: Press the Multi-function button once.
- Reject Call: Press and hold the Multi-function button for 2 seconds.
Voice Assistant
- Activate Voice Assistant: Press the Voice Assistant button once to activate Siri or Google Assistant on your connected device.
Folding the Headphones
The HD 350BT headphones feature a foldable design for easy storage and portability. Gently fold the earcups inwards towards the headband until they click into place. To unfold, reverse the process.
Maintenance
Cleaning
- Use a soft, dry, lint-free cloth to clean the headphones.
- Do not use any cleaning agents, sprays, or solvents, as these may damage the surface or internal components.
- The ear cushions can be gently wiped with a slightly damp cloth if necessary, then allowed to air dry completely.
Storage
- When not in use, store the headphones in a cool, dry place, away from direct sunlight and extreme temperatures.
- Utilize the foldable design to store them compactly.
Troubleshooting
If you encounter issues with your HD 350BT headphones, refer to the following common solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Headphones do not power on. | Low battery. | Charge the headphones using the USB-C cable. |
| Cannot pair with a Bluetooth device. | Headphones not in pairing mode; Bluetooth off on device; device too far. | Ensure headphones are in pairing mode (flashing blue/red LED). Turn on Bluetooth on your device. Move device closer to headphones (within 10 meters). |
| No sound or intermittent sound. | Volume too low; headphones not connected; interference. | Increase volume on headphones and device. Re-pair the headphones. Move away from other wireless devices. |
| Voice assistant not responding. | Voice assistant not enabled on device; device not connected. | Ensure your device's voice assistant is active. Confirm headphones are connected via Bluetooth. |
Specifications
Detailed technical specifications for the Sennheiser HD 350BT headphones:
- Model Number: 508384
- Brand: Sennheiser
- Color: Black
- Ear Placement: Over Ear
- Form Factor: Over Ear
- Impedance: 28 Ohms
- Connectivity Technology: Bluetooth 5.0
- Bluetooth Range: 10 Meters
- Control Type: Media Control, Voice Assistant
- Control Method: Physical Buttons
- Battery Charge Time: Approximately 2 Hours
- Battery Average Life: Up to 30 Hours
- Noise Control: Sound Isolation (Passive)
- Frequency Response: 18 Hz to 21000 Hz
- Audio Driver Type: Dynamic Driver
- Enclosure Material: Plastic
- Item Weight: 238 Grams
- Compatible Devices: All Bluetooth devices
- Water Resistance Level: Not Water Resistant
- Additional Features: Lightweight, Foldable Design
Warranty and Support
Sennheiser products are manufactured to the highest quality standards and come with a manufacturer's warranty. For specific warranty terms and conditions, please refer to the warranty card included in your package or visit the official Sennheiser website.
For technical support, troubleshooting assistance, or service inquiries, please contact Sennheiser customer support through their official website or the contact information provided in your product documentation.
Online Support: www.sennheiser.com/en-us/service-support
