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Sennheiser HD 4.50 BTNC BT 4.0 25hrs Black
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Bang & Olufsen Beoplay H9i BT 4.2 24hrs Cream
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| 3.5mm Connector | 1 mm | 1 mm | |
| AC Adapter Included | - | Yes | |
| Acoustic System Name | Closed Back | Closed Back | |
| Battery Life (max) | 25 hours | 24 hours | |
| Battery Recharge Time | 2 hours | 2.5 hours | |
| Battery Technology | Lithium Polymer (LiPo) | Lithium-Ion (Li-Ion) | |
| Battery Type | Built-in battery | Built-in battery | |
| Battery Voltage | 3.7 V | - | |
| Bluetooth | Yes | Yes | |
| Bluetooth Profiles | A2DP, aptX, AVRCP, HFP, HSP, | - | |
| Bluetooth Version | 4.0 | 4.2 - AAC | |
| Cable Length | 1.4 m | 1.2 m | |
| Cables Included | Audio (3.5mm), Micro-USB | Audio (3.5mm),USB Type-C | |
| Carrying Case | Yes | Yes | |
| Charging Source | USB | - | |
| Colour of Product | Black, Silver | Cream | |
| Connectivity Technology | Wired & Wireless | Wired & Wireless | |
| Connector Contacts Plating | Gold | - | |
| Continuous Audio Playback Time | - | 18 hours | |
| Depth | - | 5.2 mm | |
| Detachable Cable | Yes | Yes | |
| Driver Type | Dynamic | - | |
| Driver Unit Size | - | 40 cm | |
| Ear Coupling | Over-ear | Over-ear | |
| Ear Coupling - Over-ear | Yes | Yes | |
| Foldable | Yes | - | |
| Headphone Frequency | 18 - 22000 Hz | 20 - 20000 Hz | |
| Headphone or Headset | Mobile headset | Mobile headset | |
| Headphone Sensitivity | 113 dB | 93 dB | |
| Headset Type | Dual Ear | Dual-ear | |
| Height | - | 20.0 mm | |
| Impedance | 18 Ω (Ohms) | - | |
| LED Indicators | Yes | Yes | |
| Microphone Frequency | 100 - 10000 Hz | - | |
| Microphone Number | 2 | 4 | |
| Multi-function Control - Position | On-ear | - | |
| Multi-function Control - Type | Digital | Digitial | |
| Multi-function Control Present | Yes | Yes | |
| NFC / W1 | Yes | - | |
| Noise Cancelling | Yes | Yes | |
| Noise Reduction | - | Yes | |
| Pouch | - | Yes | |
| Rechargeable | Yes | Yes | |
| Replaceable Ear Pads | - | Yes | |
| Storage Pouch | Yes | - | |
| USB Connectivity | Yes | Yes | |
| USB Port - Micro | Yes | - | |
| USB Port - Type | Micro | C | |
| USB Port - Type C | - | Yes | |
| Volume Control Present | Yes | Yes | |
| Volume Control Type | Digital | Touch | |
| Wearing Style | Head-band | Head-band | |
| Weight | 238 g | 295 g | |
| Width | - | 19.5 mm | |
| Wireless Range | 10 m | - | |
| Wireless Type | Bluetooth | Bluetooth |
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