Introduction
Welcome to your new Senso Bluetooth Headphones, ActivBuds S255B. These wireless sports earphones are designed to provide high-fidelity audio with comfort and durability, perfect for gym, running, and workouts. Featuring IPX7 waterproof rating, HD stereo sound, and noise-cancelling technology, they ensure an immersive audio experience.

Product Features
- TRUE HD HIGH FIDELITY SOUND: Featuring latest Bluetooth 4.1 CSR technology and state of the art acoustic components that produce incredible sound quality with deep bass and crystal clear treble.
- COMFORTABLE AND SECURE FIT WITH IPX-7 WATERPROOF RATING: ActivBuds feature Ergonomically designed flexible ear hooks with gel flex silicone earbuds to ensure your headphones stay comfortably firm in place to guarantee fatigue free ears and tangle free comfort.
- LONGEST BATTERY LIFE: The new and improved lithium polymer battery allows seamless enjoyment of music for up to 8 hours and 240 hours stand-by with a quick charge of only 1.5 hours.
- BLUETOOTH V4.1 WIRELESS TECHNOLOGY WITH CVC 6.0 NOISE SUPPRESSION TECHNOLOGY: Connect seamlessly with all Bluetooth enabled devices up to 30 feet away. With Noise Suppression technology focus on your favorite music and answer calls without skips or missed words.
- 1 YEAR WARRANTY AND BONUS ITEMS: Bonus Accessories with 1-Year Manufacturer's Warranty and 30 days no-questions-asked return policy. Value for money guaranteed, Buy the Senso ActiveBuds worry free today.

Setup
Charging the Headphones
Before first use, fully charge your Senso Bluetooth Headphones.
- Locate the Micro USB charging port on the headphones.
- Connect the provided USB charging cable to the headphones and a compatible USB power source.
- The LED indicator will show charging status. A full charge takes approximately 1.5 hours.
Pairing with a Bluetooth Device
To connect your headphones to your smartphone or other Bluetooth-enabled device:
- Ensure the headphones are turned off.
- Press and hold the power button until the LED indicator flashes blue and red, indicating pairing mode.
- On your device, enable Bluetooth and search for available devices.
- Select "Senso ActivBuds S255B" from the list.
- Once connected, the LED indicator will turn solid blue or flash blue slowly.
Operating Instructions
Power On/Off
- Power On: Press and hold the multi-function button until the LED indicator lights up.
- Power Off: Press and hold the multi-function button until the LED indicator turns off.
Music Playback
- Play/Pause: Press the multi-function button once.
- Next Track: Press and hold the Volume Up (+) button.
- Previous Track: Press and hold the Volume Down (-) button.
- Volume Up: Short press the Volume Up (+) button.
- Volume Down: Short press the Volume Down (-) button.
Call Management
- Answer/End Call: Press the multi-function button once.
- Reject Call: Press and hold the multi-function button.
- Redial Last Number: Double-press the multi-function button.

Maintenance
To ensure the longevity and optimal performance of your Senso Bluetooth Headphones:
- Cleaning: Wipe the headphones with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials.
- Water Resistance: While IPX7 waterproof, avoid prolonged submersion in water. Ensure the charging port cover is securely closed before exposure to water or sweat.
- Storage: Store the headphones in their provided sturdy carry case when not in use to protect them from dust and damage.
- Charging: Always use the provided charging cable and a compatible power source to prevent battery damage.

Troubleshooting
| Problem | Solution |
|---|---|
| Headphones won't turn on | Ensure the battery is charged. Connect to a power source and charge for at least 15 minutes. |
| Cannot pair with device | Make sure headphones are in pairing mode (flashing red/blue). Turn off and on Bluetooth on your device. Clear previous pairings on your device. |
| Poor sound quality | Ensure the headphones are within the 30-foot Bluetooth range. Check for obstructions between the headphones and your device. Adjust the equalizer settings on your audio device. |
| Headphones keep falling out | Try different sizes of the included silicone ear tips to find the best fit for your ears. Adjust the flexible ear hooks for a more secure fit. |
Specifications
- Brand: Senso
- Model Name: IPX7 (ActivBuds S255B)
- Connectivity Technology: Wireless, Bluetooth 4.1
- Wireless Communication Technology: Bluetooth
- Water Resistance Level: IPX7 Waterproof
- Noise Control: Active Noise Cancellation (CVC 6.0 Noise Suppression)
- Battery Life: Up to 8 Hours (Music Playback)
- Charging Time: 1.5 Hours
- Bluetooth Range: 10 Meters (30 feet)
- Headphones Jack: Micro USB
- Material: Silicone
- Item Weight: 0.16 ounces
- Product Dimensions: 4.9 x 1.3 x 4.7 inches
Warranty and Support
Your Senso ActivBuds S255B come with a 1-Year Manufacturer's Warranty.
Additionally, a 30-day no-questions-asked return policy is offered.
For any support inquiries or warranty claims, please refer to the contact information provided in your product packaging or visit the official Senso website.