Srhythm NC25 NiceComfort 25 User Manual

Introduction

This user manual provides comprehensive information for the Srhythm NC25 (NiceComfort 25) headphones, covering setup, features, safety, specifications, and troubleshooting.

Warranty and Support

Standard Warranty: 3 months.

Extended Warranty: Prolong warranty to 18 months by registering on www.WarrantyGift.com.

Lifetime Support: For Srhythm products.

Customer Service: 7 x 24 hours. Email: service@srhythm.com.

Connect with Srhythm:

Facebook: Srhythm
Instagram: SrhythmAudio
YouTube: Srhythm
Twitter: SrhythmAudio

Safety Instructions

Hearing Safety

Do not use headphones while driving or charging.
Use headphones cautiously and stop use in dangerous situations.
Avoid listening for long periods at high volume to prevent hearing damage.
For safety, do not turn the volume too high when outdoors to ensure you can hear your surroundings.

Operation Safety

Use original or certified cables for charging with voltage within 6.3V. Power will cut off if voltage exceeds 6.3V and is within 36V. Headphones may be damaged if voltage exceeds 36V.
Keep away from children to prevent danger from improper use.
Avoid dropping headphones or operating in extreme temperatures (operating range: -15°C (5°F) – 55°C (131°F)).
Do not submerge headphones in water.
Do not use corrosive cleaners or oils to clean headphones.
Turn off Bluetooth and ANC functions when not in use to save power.

What's in the Box

NC25 Headphone x1
Portable Carry Case x1
3.5mm to 6.35mm Piano Adaptor x1
Airplane Adaptor x1 (For airplane use only)
Type-C Charging Cable x1
Audio Cable x1
Satisfaction Guarantee Card x1

At a Glance

The headphones feature the following components:

Top of Earcup:
Volume Down/Next Song button
Multi-function Button
Volume Up/Previous Song button
ANC Button
Microphones
AUX Port
Bottom of Earcup:
Charging indicator
Charging Port
Bluetooth/ANC LED Indicator Light

Button Functions:

Volume Buttons: Press to adjust volume. Long press to skip to the next/previous song.
Multi-function Button: Press to play/pause music or answer/end calls. Double-press to reject an incoming call. Triple-press for low-latency game mode.
ANC Button: Press to turn Active Noise Cancellation ON or OFF. The LED indicator light will be green when ANC is ON.
Clearing Pairing: Long press both Volume Up and Volume Down buttons simultaneously for 5 seconds.

How to Use

Bluetooth Function

Turning ON and Pairing:

Hold the Multi-function Button for 3-5 seconds to turn on Bluetooth and enter pairing mode. The LED indicator will flash blue and red quickly.
On your mobile device, turn on Bluetooth and search for "NC25". Select it to pair. The LED indicator will flash blue slowly upon successful pairing.
If prompted for a password/PIN, enter "0000".

Turning OFF:

Hold the Multi-function Button for 3-5 seconds to turn off Bluetooth.

Active Noise Cancellation (ANC)

Press the ANC Button to turn Active Noise Cancellation ON or OFF. The LED indicator light will be green when ANC is ON.

Function Details

Easy Pairing

Follow these steps to pair your headphones with a device:

Hold the Multi-function Button for 3-5 seconds to turn on Bluetooth and enter pairing mode (LED flashes blue and red).
Keep the headphones and your mobile phone close together during pairing.
Turn on your mobile phone's Bluetooth, search for "NC25", and tap to pair. The LED will flash blue slowly upon successful connection.
If a password/PIN is required, enter "0000".

Pairing with a Second Bluetooth Device

Ensure the headphones are connected to the first device and not playing music.
Hold the Multi-function Button until the headphones turn off, then continue with the "Easy Pairing" steps to re-enter pairing mode (LED flashes blue and red alternately).
Pair with the second device using the "Easy Pairing" steps.
Return to the first Bluetooth device and re-pair it with the headphones. Both devices are now paired.

Advanced Features

Wired Mode

The headphones support AUX input for wired audio sources. Simply turn off Bluetooth and plug in the audio cable. Battery power is still required for wired mode. ANC functions in wired mode. Microphones work only in Bluetooth mode. Volume cannot be adjusted on the headphones in wired mode.

Voice Dialing

Press both Volume Up and Volume Down buttons simultaneously to activate voice dialing (compatible with iPhone Siri and selected Android voice assistants).

How to Wear

The headphones are designed for comfort and portability:

Folding: The earcups can fold inwards for compact storage.
Adjustable Headband: The headband can be adjusted to fit your head size.

Airplane Adapter Connection

Connect the airplane adapter to the aircraft seat's audio socket (double holes) using the 3.5mm audio cable to connect your headphones and the adapter.

Warning: Use only for airplane use. Do not plug into a power socket.

Headphone Specifications

LED Indicator Light

Pairing: Blue and red lights flash alternately.
Paired: Blue light flashes.
Playing: Blue light flashes slowly.
Charging: Red light turns on.
Full Charge: Red light turns off or Blue light turns on.
Battery Low: Red light turns on with voice prompt.
ANC ON: Green light turns on.
ANC OFF: Green light turns off.
Bluetooth OFF: Blue and red lights turn off.

Note: LED colors may occasionally mix to appear as other colors (e.g., pink, purple).

Technical Specifications

Product Name: Srhythm NC25
Battery Capacity: 1000mAh
Input: 5V 220mAh
Chip: ATS
Charging Time: About 2 hours
Use Time: 50 hours
Bluetooth Version: V5.0
Bluetooth Profile: A2DP, AVRCP, HSP, HFP
Bluetooth Range: 10m/33ft
Waterproof Rating: IPX4
Net Weight: 180g
Impedance: 32 Ω
Driver Diameter: Φ40mm
Frequency Response: 20-20KHz

Charging

Use the included Type-C charging cable to connect to the headphone's charging port. Connect the other end to a computer USB port or a USB wall charger (under 6.3V). Turn off Bluetooth and ANC before charging. Do not use headphones while charging.

The LED indicator will be off or blue when fully charged, depending on the headphone's power status.

To pair after charging, turn on your phone's Bluetooth, find "NC25", and click to pair. The LED will flash blue slowly upon successful connection.

To turn off Bluetooth, hold the Multi-function Button for 3-5 seconds.

Troubleshooting Tips:

Fully charge your headphones (do not use a fast charger).
Reset headphones by inserting and removing the audio cable from the headphone's audio socket. (Updated NC25 headphones may reset automatically during charging).
Delete Pairing: Hold both "Volume Up" and "Volume Down" buttons simultaneously for 5 seconds.

Frequently Asked Questions (Q&A)

Q: Why can't my headphones pair with my mobile phone?: A: Check if your headphones are in pairing or reconnection mode. Ensure your device's Bluetooth search function is on. If so, go to your device's Bluetooth menu, remove/ignore the "NC25" pairing name, and try reconnecting using the "Easy Pairing" steps.
Q: Why won't my headphones turn on?: A: Please check the battery status of your headphones.
Q: Can I replace the battery?: A: No, the headphones have a built-in, non-detachable Li-Polymer battery that cannot be replaced.
Q: Can I use headphones while driving?: A: For your safety, it is strongly recommended not to use headphones while driving to avoid distractions.
Q: Why do my headphones sometimes disconnect within 10 meters?: A: Check for nearby metal materials or obstacles that might interfere with the Bluetooth connection. Bluetooth is sensitive to objects between devices.
Q: Why can't I hear any sound from my computer or mobile phone?: A: Verify that your computer's output channel supports the A2DP profile. Also, check the volume settings on both the headphones and your computer/mobile phone.
Q: Why can't I control the volume of an app on my phone using the headphones?: A: Due to variations in application software configurations, headphones may not be fully compatible with all apps.
Q: What should I do if Bluetooth won't turn on or off?: A: Reset the Bluetooth function by inserting an audio cable into the headphone's audio port and then removing it. Before reconnecting, remove/ignore the "NC25" pairing name from your phone.
Q: Why does Bluetooth turn off when I connect an audio cable?: A: This is a special feature. When an audio cable is inserted, all Bluetooth functions stop. Bluetooth will become available again once the audio cable is removed.
Q: Why can't I turn the headphones on/off?: A: ANC and Bluetooth use the same LED indicator but with different colors (green for ANC, blue for Bluetooth). If you're confused, turn off ANC first. You'll become familiar with the light meanings with use.
Q: Why is the audio quality poor on a Windows PC?: A: Some users report poor audio quality on Windows PCs. Ensure you are using "Headphone Mode" (not "Headset Mode") for output, which significantly improves audio quality. "Headset Mode" is for compressed VOIP calls.

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