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Sennheiser Momentum Free BT 4.2 6 Black
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B&O E8 BT 4.2 4hrs True Wireless Black
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Technical Specifications
| Acoustic System Name | Closed Back | Closed Back | |
| Battery Life (max) | 6 hours | 4 hours | |
| Battery Recharge Time | - | 2 hours | |
| Battery Technology | Lithium Polymer (LiPo) | Lithium-Ion (Li-Ion) | |
| Battery Type | - | Built-in battery | |
| Battery Voltage | 3.7 V | - | |
| Bluetooth | Yes | Yes | |
| Bluetooth Profiles | A2DP, AVRCP, HFP, HSP | AAC | |
| Bluetooth Version | 4.2 | 4.2 | |
| Cables Included | USB | USB | |
| Carrying Case | Yes | Yes | |
| Charging Case | - | Yes | |
| Charging Source | USB | Charging Case | |
| Colour of Product | Black, Red | Black | |
| Connectivity Technology | Wireless | Wireless | |
| Continuous Audio Playback Time | - | 4 hours | |
| Depth | - | 20 mm | |
| Driver Type | - | Dynamic | |
| Driver Unit Size | - | 5.7 cm | |
| Ear Coupling | In-ear | In-ear | |
| Ear Coupling - In-ear | Yes | Yes | |
| Extra Earbuds | Yes | Yes | |
| Headphone Frequency | 15 - 22000 Hz | 20 - 20000 Hz | |
| Headphone or Headset | Mobile headset | Mobile headset | |
| Headphone Sensitivity | 118 dB | 107 dB | |
| Headset Type | Dual-ear | Dual Ear | |
| Height | - | 25 mm | |
| Impedance | 28 Ω (Ohms) | 16 Ω (Ohms) | |
| Microphone Number | 1 | 1 | |
| Multi-function Control - Position | On cable | On-ear | |
| Multi-function Control - Type | Digital | Digital | |
| Multi-function Control Present | Yes | Yes | |
| Rechargeable | Yes | Yes | |
| Replaceable Ear Pads | Yes | Yes | |
| Smart Assistant Button (Siri, Google) | - | Yes | |
| Volume Control Present | Yes | Yes | |
| Volume Control Type | Digital | Touch | |
| Wearing Style | Neck-band | In-ear | |
| Weight | 40 g | 13 g | |
| Width | - | 23 mm | |
| Wireless Range | 10 m | - | |
| Wireless Type | Bluetooth | Bluetooth |
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