Introduction
The Panasonic RZ-S300W True Wireless Bluetooth Earphones are designed for comfort, connectivity, and high-quality audio. These ultra-compact earbuds are suitable for music, podcasts, calls, and smartphone content, offering a stable connection and long battery life. They are also IPX4 splash resistant and compatible with voice assistants like Amazon Alexa, Siri, and Google Assistant.

Image: Panasonic RZ-S300W True Wireless Earbuds and their charging case, displayed in a vibrant green color.
What's in the Box
Verify that all items are present in the packaging:
- Earphones (Left and Right)
- Charging Case
- USB Charging Cord
- Earpieces Set: XS, S, M, L (various sizes for optimal fit)

Image: All components included in the product package: the two earbuds, the charging case, a USB charging cable, and four pairs of silicone eartips in different sizes (XS, S, M, L).
Setup
1. Charging the Earbuds and Case
Before first use, fully charge the earbuds and the charging case. The charging case holds approximately 20 hours of additional power.
- Place both earbuds into the charging case. Ensure they are seated correctly; a red light on the earbuds indicates charging is in progress.
- Connect the supplied USB charging cord to the charging case and a USB power source.
- The charging case will indicate its charging status via LED indicators. A full charge for the case takes approximately 4 hours.

Image: A visual representation of battery life: a full 2-hour charge provides 7.5 hours of playback, and a quick 15-minute charge yields 90 minutes of playback time.
2. Pairing with a Bluetooth Device
The earbuds use Bluetooth 5.0 for a stable connection.
- Ensure the earbuds are charged and placed in the charging case.
- Open the charging case. The earbuds will automatically enter pairing mode (indicated by blinking red and blue lights on the earbuds).
- On your device (smartphone, tablet, etc.), go to Bluetooth settings and enable Bluetooth.
- Select "RZ-S300W" from the list of available devices.
- Once connected, the earbud lights will stop blinking.
Note: If you experience connection issues, try placing the earbuds back in the case for at least 10 seconds, then open to re-enter pairing mode (they will blink red and blue).
3. Fitting the Earbuds
Proper fit is crucial for sound quality and comfort.
- Choose the earpiece size (XS, S, M, L) that provides a snug and comfortable seal in your ear canal. Experiment with different sizes.
- Gently insert each earbud into your ear, twisting slightly until it feels secure and comfortable.

Image: A woman wearing one of the Panasonic RZ-S300W earbuds, illustrating how the earbud fits comfortably and securely in the ear, emphasizing a clear and reliable connection.
Operating Instructions
Touch Sensor Controls
The earbuds feature intuitive touch sensors for various functions:
Action | Function |
---|---|
Single Tap (Left/Right) | Play/Pause Music, Answer/End Call |
Double Tap (Right) | Next Track |
Double Tap (Left) | Volume Up |
Triple Tap (Right) | Previous Track |
Triple Tap (Left) | Volume Down |
Long Press (Left/Right) | Activate Voice Assistant (Alexa, Siri, Google Assistant), Reject Call |
These controls can often be customized via the Panasonic Audio Connect app.
Panasonic Audio Connect App
Enhance your experience by downloading the Panasonic Audio Connect app. The app allows you to:
- Check battery levels for each earbud.
- Adjust sound modes and equalizer settings.
- Customize touch sensor functions.
- Locate your earbuds if misplaced.
- Update earbud firmware.

Image: A smartphone displaying the Panasonic Audio Connect app, showing features like individual earbud battery levels, ambient sound control, sound mode selection, and a map-based "Find headphones" function. The Alexa built-in logo is also visible, indicating voice assistant compatibility.
Voice Assistant Compatibility
The RZ-S300W earbuds are compatible with popular voice assistants:
- Amazon Alexa: Built-in for direct access.
- Siri: Compatible with Apple devices.
- Google Assistant: Compatible with Android devices.
Activate your preferred voice assistant by long-pressing the touch sensor on either earbud (default setting).
Water Resistance (IPX4)
The earbuds have an IPX4 splash resistant rating, meaning they are protected against splashing water from any direction. This makes them suitable for use during workouts or in light rain. They are not designed for submersion in water.
Maintenance
Cleaning
- Regularly clean the earbuds and charging case with a soft, dry cloth.
- For the earpieces, remove them from the earbuds and clean with a mild soap solution if necessary, then rinse thoroughly and dry completely before reattaching.
- Ensure charging contacts on both earbuds and case are free of dust and debris. Use a dry cotton swab if needed.
Storage
When not in use, always store the earbuds in their charging case to protect them and keep them charged.
Troubleshooting
Problem | Possible Cause / Solution |
---|---|
Earbuds not pairing / connecting. |
|
Low volume or poor sound quality. |
|
Earbuds not charging. |
|
Intermittent connection / audio dropouts. |
|
Specifications
Feature | Detail |
---|---|
Model Name | True Wireless Bluetooth Earphones with Ultra-Compact Design |
Connectivity Technology | Bluetooth |
Wireless Communication Technology | Bluetooth |
Bluetooth Version | 5.0 |
Bluetooth Range | 10 Meters (approx. 33 feet) |
Water Resistance Level | IPX4 (Splash Resistant) |
Audio Driver Type | Dynamic Driver (6mm units) |
Frequency Range | 20 Hz - 20,000 Hz |
Battery Life (Earbuds) | Up to 7.5 hours per charge |
Battery Life (with Charging Case) | Approximately 26 hours total playback (7.5 hours + 2.5 charges from case) |
Charging Time (Earbuds) | Approx. 2 hours for full charge |
Charging Time (Carrying Case) | Approx. 4 hours |
Control Method | Touch, Voice |
Compatible Devices | Bluetooth devices (Smartphones, Tablets, etc.) |
Dimensions (Product) | 6.2 x 4.4 x 2.5 inches |
Item Weight | 6.2 ounces |
Material | Plastic |
Color | Green |
UPC | 885170424654 |
Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the official Panasonic website or contact Panasonic customer service directly. Keep your proof of purchase for warranty claims.
You can find more information and support resources on the Panasonic Store on Amazon or the official Panasonic global website.