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Sony MDRXB650BTB BT 4.0 30hrs Black
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Philips SHB3175BK/27 BT 4.1 12hrs Black
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Technical Specifications
| Acoustic System Name | Closed Back | Closed Back | |
| Battery Life (max) | 30 hours | 12 hours | |
| Battery Recharge Time | 4 hours | - | |
| Battery Technology | - | Lithium Polymer (LiPo) | |
| Bluetooth | Yes | Yes | |
| Bluetooth Profiles | - | A2DP, AVRCP, HFP, HSP | |
| Bluetooth Version | 4.0 | 4.1 | |
| Cables Included | - | USB | |
| Charging Source | - | USB | |
| Colour of Product | Black | Black | |
| Connectivity Technology | Wireless | Wireless | |
| Continuous Audio Playback Time | 30 hours | 12 hours | |
| Depth | - | 46 mm | |
| Driver Unit Size | 30 cm | 40 cm | |
| Ear Coupling | Over-ear | Over-ear | |
| Ear Coupling - Over-ear | Yes | Yes | |
| Foldable | Yes | Yes | |
| Headphone Frequency | 20 - 20000 Hz | 8 - 21500 Hz | |
| Headphone or Headset | Mobile headset | Mobile headset | |
| Headphone Sensitivity | 95 dB | 104 dB | |
| Headset Type | Dual-ear | Dual Ear | |
| Height | - | 185 mm | |
| Impedance | 24 Ω (Ohms) | 32 Ω (Ohms) | |
| Magnet Type | Neodymium | Neodymium | |
| Maximum Input Power | - | 40 Watts | |
| Microphone Number | 1 | 1 | |
| Multi-function Control - Position | On-ear | On-ear | |
| Multi-function Control - Type | Digital | Digital | |
| Multi-function Control Present | Yes | Yes | |
| NFC / W1 | Yes | - | |
| Rechargeable | Yes | Yes | |
| USB Connectivity | Yes | Yes | |
| USB Port - Micro | Yes | Yes | |
| USB Port - Type | Micro | Micro | |
| Volume Control Present | Yes | Yes | |
| Volume Control Type | Button | Digital | |
| Wearing Style | Head-band | Head-band | |
| Weight | 190 g | 190 g | |
| Width | - | 190 mm | |
| Wireless Range | 10 m | 10 m | |
| Wireless Type | Bluetooth | Bluetooth |
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