OnePlus Buds 4 vs KZ Castor Pro Wired Earphones
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General
| Brand | OnePlus | KZ |
| Model | Buds 4 | Castor Pro |
| Country of Origin | China | |
| Design | TWS Earbuds | Earphone |
| Type | In the Ear | In the Ear |
| Connectivity | Wireless | Wired |
Design and Body
| Dimensions | 52.4 x 65.4 x 25.3 mm | |
| Weight | 49.02 g (With Case), 4.73 g Per Earbud | |
| Cord Length | 1.25 m | |
| Cord Type | 3.5mm Jack |
Features
| Bluetooth | Yes, 5.4 | |
| Bluetooth Range | 10 m | |
| USB | Yes | |
| Microphone | Yes, 3 Mics Per Side | No |
| Voice Assistant | Yes | |
| Water Resistant | Yes | |
| Monaural | Yes | |
| Controls | Touch | |
| Music Controls | Volume +/-, Play/Pause, Previous/Next Track | |
| Call Controls | Answer/Hang Up/Reject calls | |
| Switch between Call and Music | Yes | |
| Additional Features | IP55 Dust and Water Resistance, OnePlus 3D Audio, Sound Master EQ, Golden Sound, 47ms Low Latency, AI Translation, Voice Assistant Shortcut, Find My Earbuds, Double-Tap for Camera Control, Compatibility with the HeyMelody App, OTA Updates, Dual-Device Connection, Google Fast Pair, Transparency Mode | 0.75mm 2 pin Detachable Earbuds |
Sound Features
| Deep Bass | Yes | Yes |
| Impedance | 18 ohm | 22-40Ω |
| Sensitivity | 118±1.3dB @1mW | 101-104dB |
| Frequency Response | 15 Hz (Min) - 40 kHz (Max) | 20 Hz (Min) - 40 kHz (Max) |
| Driver Unit | 10 mm | |
| Driver Type | 11mm Woofer Plus 6mm Tweeter | Dual Dynamic Driver |
| Noise Reduction | TUV High Performance Noise Cancellation, 800 Times Per Second Real-Time Adjustment, 200% Voice Cancelling Improvement When Compared with OnePlus Buds 3, Up to 5,500 Hz Noise Cancellation Range, 3-mic AI Call Noise Cancellation | |
| Active Noise Cancellation | Yes, Up to 55dB Real-Time Adaptive ANC | |
| Other Features | Oneplus 3D Spatial Audio, Golden Sound, Sound Master EQ |
Extra
| Sales Package | OnePlus Buds 4 x 1 Pair, OnePlus Buds 4 Charging Case x 1, Type-C Charging Cable x 1, Ear Tips (S, M, L Pairs; M Pre-installed), User Manual And Safety and Warranty x 1 | KZ Castor Earphones, 2x Pair Silicone Eartips, 1x OFC Cable, 1x Tuning Pin, 1x User Manual |
| Inline Remote | No | |
| Other | Earbuds Dimension (31 x 20.6 x 24.2) mm, -38±1dB Microphone Sensitivity, 101dB Sound Pressure, 10mW Rated Power, LHDC 5.0 / AAC / SBC Bluetooth Codec, HFP/A2DP/AVRCP Bluetooth Transmission Protocol |
Power Features
| Battery Capacity | 530 mAh (Case), 62 mAh Per Earbud | |
| Battery | 10 Mins Charge = 11 Hours of Playtime | |
| Wireless Charging | No | |
| Battery Life | 45 hours with Case (ANC Off) 11 hours (Earbuds with ANC Off) 24 hours with Case (ANC On) 6 hours (Earbuds with ANC On) | |
| Charging Time | 1.33 hours (Case), 50 min (Earbuds) |
Warranty
| Warranty | 1 year, Manufacturer Warranty | 1 year |
| Warranty Type | Manufacturer | Manufacturer |
| Covered in Warranty | Manufacturing Defect | Manufacturing Defect |
| Not Covered in Warranty | Physical Damage | Physical Damage |
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