Popular Comparisons with Sennheiser HD 4.40:
| DESIGN AND DIMENSIONS | Sennheiser HD 4.40 | - |
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| Product Type | Headphones - Bluetooth - wireless - NFC | - |
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| SOUND QUALITY | Sennheiser HD 4.40 | - |
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| Headphones Form Factor | Full size | - |
|---|---|---|
| Ear Cups Type | Closed | - |
| Connectivity Technology | Wireless | - |
| Wireless Technology | Bluetooth | - |
| Bluetooth Version | Bluetooth 4.0 | - |
| Sound Output Mode | Stereo | - |
| Frequency Response | 18 - 22000 Hz | - |
| Total Harmonic Distortion (THD) | 0.5% | - |
| Sensitivity | 113 dB | - |
| Impedance | 18 Ohm | - |
| MICROPHONE | Sennheiser HD 4.40 | - |
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| Form Factor | Built-in | - |
|---|---|---|
| Microphone Operation Mode | Omni-directional | - |
| Frequency Response | 100 - 10000 Hz | - |
| Microphones Included | 2 | - |
| BATTERY AND CHARGING | Sennheiser HD 4.40 | - |
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| Battery Type | Headphone battery lithium polymer | - |
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