1. Introduction
Thank you for choosing the Pulse Deep TWS Wireless Earbuds, model PH425. These earbuds are designed to provide an immersive audio experience with advanced features such as Active Noise Cancellation (ANC) and Transparency Mode, coupled with stable Bluetooth 5.3 connectivity and extended battery life. This manual will guide you through the setup, operation, and maintenance of your new earbuds.
2. Package Contents
Please ensure all items are present in your package:
- 1x Pair of Pulse Deep TWS Wireless Earbuds (PH425)
- 1x Charging Case
- 1x USB Type-C Charging Cable
- 1x Quick Start Guide
- 3x Pairs of Articulated Eartips (Small, Medium, Large)
3. Product Overview
Familiarize yourself with the components of your Pulse Deep TWS Wireless Earbuds.

Image 3.1: The Pulse Deep TWS Wireless Earbuds charging case in black.

Image 3.2: The earbuds removed from their open charging case, showing the design and charging contacts.

Image 3.3: A detailed view of the Pulse Deep TWS Wireless Earbuds, highlighting the in-ear design and touch control area.
4. Setup
4.1. Charging the Earbuds and Case
Before first use, fully charge the earbuds and the charging case.
- Place the earbuds into the charging case. Ensure they are correctly seated in their respective slots.
- Connect the USB Type-C charging cable to the charging port on the case and the other end to a USB power source (e.g., wall adapter, computer USB port).
- The LED indicator on the charging case will illuminate to show charging status. Once fully charged, the indicator may change color or turn off.
- A full charge provides up to 24 hours of total playback time with the charging case.
4.2. Pairing with Your Device
The earbuds use Bluetooth 5.3 for a fast and stable connection.
- Ensure the earbuds are charged and inside the charging case.
- Open the charging case. The earbuds will automatically enter pairing mode, indicated by a flashing LED light on the earbuds.
- On your device (smartphone, tablet, laptop), go to the Bluetooth settings.
- Search for new devices and select "Pulse Deep PH425" from the list.
- Once connected, the LED indicator on the earbuds will stop flashing or change to a solid light.
- The earbuds will automatically reconnect to the last paired device when removed from the case, if Bluetooth is enabled on the device.
5. Operating Instructions
5.1. Touch Controls
The Pulse Deep PH425 earbuds feature intuitive touch controls. Specific functions may vary slightly, but common controls include:
- Play/Pause: Single tap on either earbud.
- Next Track: Double tap on the right earbud.
- Previous Track: Double tap on the left earbud.
- Answer/End Call: Single tap on either earbud.
- Reject Call: Press and hold either earbud for 2 seconds.
- Activate Voice Assistant: Triple tap on either earbud (e.g., Google Assistant, Siri).
5.2. Active Noise Cancellation (ANC)
ANC technology blocks external noise for an immersive listening experience.
- To activate/deactivate ANC: Press and hold the touch control area on the left earbud for 2 seconds. You will hear an audible prompt confirming the mode change.
5.3. Transparency Mode
Transparency Mode allows you to hear your surroundings without removing the earbuds, enhancing safety and awareness.
- To activate/deactivate Transparency Mode: Press and hold the touch control area on the right earbud for 2 seconds. You will hear an audible prompt confirming the mode change.
- Note: ANC and Transparency Mode cannot be active simultaneously. Activating one will deactivate the other.
5.4. Making and Receiving Calls
The integrated microphone ensures clear calls.
- Answer a call: Single tap on either earbud.
- End a call: Single tap on either earbud during a call.
- Reject a call: Press and hold either earbud for 2 seconds when an incoming call is received.
6. Maintenance
6.1. Cleaning
Regular cleaning helps maintain optimal performance and hygiene.
- Use a soft, dry, lint-free cloth to clean the earbuds and charging case.
- Gently remove any earwax or debris from the eartips and speaker mesh using a small, soft brush or cotton swab.
- Do not use abrasive cleaners, alcohol, or chemical solvents.
6.2. Storage
Store your earbuds properly to prolong their lifespan.
- Always store the earbuds in their charging case when not in use.
- Keep the case and earbuds in a cool, dry place, away from extreme temperatures, humidity, and direct sunlight.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Earbuds not pairing | Bluetooth off on device, earbuds not in pairing mode, out of range. | Ensure Bluetooth is on. Place earbuds in case, close, then open to re-enter pairing mode. Move device closer to earbuds. |
| No sound from one earbud | Low battery, earbud not connected, earbud malfunction. | Charge both earbuds. Re-pair the earbuds. If issue persists, contact support. |
| Poor sound quality | Improper fit, dirty eartips/speaker mesh, interference. | Try different eartip sizes for a secure fit. Clean eartips and speaker mesh. Move away from sources of interference. |
| Charging issues | Dirty charging contacts, faulty cable/charger. | Clean charging contacts on earbuds and case. Try a different USB Type-C cable and power source. |
8. Specifications
- Brand: Pulse
- Model Number: PH425
- Color: Black
- Form Factor: In-ear
- Connectivity: Bluetooth 5.3, Wireless
- Battery Life: Up to 24 hours (with charging case)
- Special Features: Active Noise Cancellation (ANC), Transparency Mode, Rechargeable Battery, Lightweight
- Compatible Devices: Cell phones, Notebooks, Tablets
- Material: Plastic
- Included Components: Earbuds, Charging Case, USB Type-C Cable, Quick Guide, 3 Pairs of Eartips
9. Warranty and Support
The Pulse Deep TWS Wireless Earbuds (PH425) come with a 3-year manufacturer's warranty. For warranty claims, technical support, or further assistance, please refer to the contact information provided in your Quick Start Guide or visit the official Pulse website.