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

From a usability standpoint, both models provide a reliable and premium headphone experience. If you're comparing Sony WI-C400 and OnePlus BT31B, both models offer a strong combination of sound performance, comfort, and modern wireless features. The driver size differs between the two (9 mm vs NA), which can influence sound depth, bass response, and overall audio clarity. Sony WI-C400 uses Bluetooth 4.2 while OnePlus BT31B supports Bluetooth 4.1, which can impact connectivity stability and efficiency. There is a noticeable difference in weight (35 gm vs 30 gm), which may affect comfort during extended use. 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 and OnePlus BT31B offer different noise cancellation capabilities (NA vs No), which can impact how effectively they block external noise. Battery life varies between the two (20 Hours vs 8 Hours), which affects how long you can use them on a single charge.

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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Top Differences