CMF BY NOTHING Buds Pro 2
CMF BY NOTHING Buds 2a User Manual
Model: Buds Pro 2
Brand: CMF BY NOTHING
1. Introduction
Welcome to the CMF BY NOTHING Buds 2a user manual. These earbuds are designed to deliver a premium audio experience with advanced features. This manual will guide you through the setup, operation, and maintenance of your new earbuds.
Key Features:
- 42 dB Active Noise Cancellation: Block out distractions and switch to Transparency Mode with ease.
- 12.4mm Dirac-Tuned Drivers: Enhanced sound quality with Ultra Bass and custom EQ via Nothing X app.
- Up to 35.5 Hours Battery Life: Enjoy extended listening with fast charging capabilities.
- Bluetooth 5.4 & Multipoint Connectivity: Stay connected to two devices with seamless switching.
- IPX4 Water Resistant: Designed for workouts and daily use with sweat and splash resistance.

Figure 1.1: Overview of CMF Buds 2a key features including Active Noise Cancellation, Dirac-Tuned Drivers, IP54 rating, and battery life.
2. Package Contents
Ensure all items are present in your product package:
- 2x Earbuds (Left and Right)
- 1x Charging Case
- Ear tips in sizes S, M, L
- Safety Information
- Warranty Information & User Guide

Figure 2.1: CMF Buds 2a earbuds and charging case.
3. Setup
3.1 Charging the Earbuds and Case
Before first use, fully charge the earbuds and the charging case. Connect the charging case to a power source using a compatible USB-C cable (not included). The indicator light on the case will show charging status.
- A 10-minute fast charge provides approximately 5.5 hours of playback.
- Full charge of earbuds: 70 minutes.
- Full charge of carrying case: 70 minutes.

Figure 3.1: Battery life and fast charging details.
3.2 Pairing with Your Device
- Ensure the earbuds are in the charging case and the case lid is open.
- Press and hold the function button on the charging case until the indicator light flashes white, indicating pairing mode.
- On your device (smartphone, tablet, laptop), enable Bluetooth and search for "CMF Buds 2a" in the list of available devices.
- Select "CMF Buds 2a" to connect. The indicator light will turn solid white when connected.
3.3 Nothing X App Installation
For full control and customization of your CMF Buds 2a, download the Nothing X app from your device's app store. The app allows you to:
- Customize Equalizer settings.
- Switch on Ultra Bass.
- Enable Low Lag Mode.
- Customize touch controls.
- Manage dual device connections.
- Access ChatGPT integration (where available).

Figure 3.2: Nothing X App features for enhanced control.
4. Operating Instructions
4.1 Touch Controls
The CMF Buds 2a feature intuitive touch controls on each earbud. Default controls typically include:
- Single Tap: Play/Pause music, Answer/End call.
- Double Tap: Skip to next track, Reject call.
- Triple Tap: Skip to previous track.
- Press and Hold: Switch between Active Noise Cancellation (ANC) and Transparency Mode.
- Voice Control: Activate voice assistant (Google Assistant, Siri) via customizable controls in the Nothing X app.
Refer to the Nothing X app for detailed customization of touch gestures.
4.2 Active Noise Cancellation (ANC) and Transparency Mode
The earbuds offer 42 dB Active Noise Cancellation to reduce ambient noise. Transparency Mode allows you to hear your surroundings without removing the earbuds.
- Toggle between ANC, Transparency Mode, and Noise Cancellation Off using the touch controls or the Nothing X app.

Figure 4.1: Active Noise Cancellation and Transparency Mode.
4.3 Ultra Bass Technology
Experience enhanced bass with the Ultra Bass Technology 2.0, powered by 12.4mm Dirac-Tuned Drivers. This feature can be adjusted or enabled through the Nothing X app for a personalized audio experience.

Figure 4.2: Details on audio drivers and Ultra Bass technology.
4.4 Multipoint Connectivity
The CMF Buds 2a support Bluetooth 5.4 with multipoint connectivity, allowing you to connect to two devices simultaneously and seamlessly switch between them.

Figure 4.3: Bluetooth and connectivity features.
5. Maintenance
5.1 Cleaning
- Regularly clean the earbuds and charging case with a soft, dry, lint-free cloth.
- Remove ear tips and clean them with mild soap and water, then dry thoroughly before reattaching.
- Gently clean the charging contacts on both the earbuds and the case with a dry cotton swab.
5.2 Storage
- Store the earbuds in their charging case when not in use to protect them and keep them charged.
- Avoid storing in extreme temperatures or high humidity.
5.3 Water Resistance (IPX4)
The earbuds are IPX4 water resistant, meaning they are protected from splashing water from any direction. They are suitable for workouts and daily use but are not designed for swimming or showering. Do not submerge the earbuds in water.
6. Troubleshooting
6.1 Connectivity Issues
- Earbuds not pairing: Ensure earbuds are charged. Place them in the case, close the lid, then open and try pairing again. Check if the device's Bluetooth is on.
- Only one earbud working: Place both earbuds back in the case, close the lid for 5 seconds, then open. Check battery levels in the Nothing X app.
- Frequent disconnections: Ensure no strong interference sources nearby. Keep the earbuds within the 10-meter Bluetooth range.
6.2 Audio Issues
- No sound: Check volume levels on both the earbuds and your connected device. Ensure earbuds are properly connected.
- Low volume: Clean ear tips and earbud grilles to remove any debris. Adjust volume on your device.
- Poor sound quality: Ensure ear tips provide a good seal. Try different sized ear tips. Check audio settings in the Nothing X app.
6.3 Charging Issues
- Earbuds not charging: Ensure charging contacts on both earbuds and case are clean and dry. Try a different USB-C cable and power adapter.
- Case not charging: Verify the charging cable and adapter are working. Check the charging port for any obstructions.
7. Specifications
| Feature | Detail |
|---|---|
| Model Name | Buds Pro 2 (B172) |
| Noise Control | Active Noise Cancellation (42 dB) |
| Audio Driver Size | 12.4mm (Dirac-Tuned Dynamic Driver) |
| Frequency Response | 20 Hz |
| Sensitivity | 45 dB |
| Impedance | 32 Ohm |
| Connectivity Technology | Wireless (Bluetooth 5.4) |
| Bluetooth Range | 10 Metres |
| Battery Life (Earbuds) | Up to 11 Hours (standalone playback) |
| Total Playback Time (with case) | Up to 35.5 Hours |
| Fast Charging | 10 min charge = 5.5 hrs playback |
| Charging Time (Earbuds/Case) | 70 Minutes |
| Water Resistance Level | IPX4 |
| Control Type | Touch Control, Call Control, Voice Control, Media Control, Volume Control, Noise Control |
| Item Weight | 55.8 Grams |
| Product Dimensions | 6.3 x 5.8 x 2.8 cm |
| Material | ABS, Plastic, PC, Silicone |
8. Warranty and Support
8.1 Warranty Information
Your CMF BY NOTHING Buds 2a come with a 1 Year Warranty from the date of purchase. Please retain your proof of purchase for warranty claims. The warranty covers manufacturing defects but does not cover damage caused by misuse, accidents, or unauthorized modifications.
8.2 Customer Support
For any queries, technical assistance, or warranty claims, please contact CMF Support:
- Toll-Free Number: 1800-202-1232
- Email: support.india@cmf.tech
Importer/Packer Details:
Essentially Nothing Private Limited, 7th Floor, Tower-B, Golf View Towers, Sector-42, Gurgaon, Haryana – 122002, India.

Figure 8.1: CMF Support details and service commitment.
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