Sony WI-C400 vs OnePlus BT31B – Specs, Price & Comparison (2026)

Codec: Audio signal compression and conversion format. Advanced Audio Coding. Simply tap your device on the NFC logo. Keep music going with up to 20 hours of long-lasting battery. Comfortable behind-the-neck style with cable management. Easy BluetoothÂ® connectivity with NFC One-touch. Vibration for incoming call. Bluetooth standard profiles indicate the purpose of Bluetooth communications between devices. The behind-the-neck design is shaped for comfortable, all day listening. Keep your cable clipped neatly out of the way in your neckband with the adjuster and stopper. Comfortable behind-the-neck style with cable management. Personal Computer with pre-installed with any of the following operating systems and USB port.

Just 10 minutes of charge gives you up to 5 hours of sound Designed for durability and comfort, you can effortlessly switch between music, calls and Google Assistant Up To 8 Hours Of Playtime Attractive ergonomics with a Comfort Fit Google Assistant TM is a trademark of Google LLC Resistance Type- Splash Proof, Water Proof

Key Differences

Sony WI-C400 and OnePlus BT31B offer different noise cancellation capabilities (NA vs No), which can impact how effectively they block external noise. Overall, both headphones are feature-rich and cater to users looking for a combination of sound quality, comfort, and wireless convenience. There is a noticeable difference in weight (35 gm vs 30 gm), which may affect comfort during extended use. Sony WI-C400 and OnePlus BT31B are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. The frequency response differs (8 Hz - 22,000 Hz vs 20 Hz - 20000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Sony WI-C400 uses Bluetooth 4.2 while OnePlus BT31B supports Bluetooth 4.1, which can impact connectivity stability and efficiency. Battery life varies between the two (20 Hours vs 8 Hours), which affects how long you can use them on a single charge. The driver size differs between the two (9 mm vs NA), which can influence sound depth, bass response, and overall audio clarity.

Verdict: Both models are competitive, and your decision should be based on your usage needs and preferred features.

Top Differences

Battery Life: 20 Hours vs 8 Hours
Noise Cancelling: NA vs No
Driver Size: 9 mm vs NA
Bluetooth: 4.2 vs 4.1
Weight: 35 gm vs 30 gm

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Key Differences

Top Differences