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KitSound Comet BT 4.1 4hrs True Wireless Red
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Philips SHB4205BK/27 BT 4.1 7hrs Black
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Technical Specifications
| Acoustic System Name | Closed Back | Closed Back | |
| Battery Life (max) | 4 hours | 7 hours | |
| Battery Recharge Time | 2 hours | - | |
| Battery Technology | Lithium Polymer (LiPo) | Lithium Polymer (LiPo) | |
| Battery Voltage | 3.7 V | - | |
| Bluetooth | Yes | Yes | |
| Bluetooth Profiles | - | A2DP, AVRCP, HFP, HSP | |
| Bluetooth Version | 4.1 | 4.1 | |
| Cables Included | USB | USB | |
| Carrying Case | Yes | - | |
| Charging Source | USB | USB | |
| Colour of Product | Black, Red | Black | |
| Connectivity Technology | Wireless | Wireless | |
| Continuous Audio Playback Time | - | 7 hours | |
| Depth | 100 mm | 15 mm | |
| Diaphragm Material | - | Polyethylene terephthalate (PET) | |
| Driver Unit Size | 8 cm | 12.2 cm | |
| Ear Coupling | In-ear | In-ear | |
| Ear Coupling - In-ear | Yes | Yes | |
| Ear Hook present | Yes | - | |
| Ear Hook Type - Fin | Yes | - | |
| Extra Earbuds | Yes | - | |
| Headphone Frequency | 5 - 20000 Hz | 9 - 21000 Hz | |
| Headphone or Headset | Headphones | Mobile headset | |
| Headphone Sensitivity | 95 dB | 105 dB | |
| Headset Type | - | Dual Ear | |
| Height | 100 mm | 175 mm | |
| Impedance | - | 32 Ω (Ohms) | |
| Magnet Type | - | Neodymium | |
| Maximum Input Power | - | 30 Watts | |
| Microphone Number | - | 1 | |
| Multi-function Control - Position | - | On cable | |
| Multi-function Control - Type | - | Digital | |
| Multi-function Control Present | - | Yes | |
| Power Button | Yes | - | |
| Rechargeable | Yes | Yes | |
| Replaceable Ear Pads | Yes | - | |
| USB Connectivity | Yes | Yes | |
| USB Port - Micro | Yes | Yes | |
| USB Port - Type | Micro | Micro | |
| Volume Control Present | - | Yes | |
| Volume Control Type | - | Digital | |
| Wearing Style | Ear-hook, In-ear | In-Ear, Neck-band | |
| Weight | 13 g | 38 g | |
| Width | 100 mm | 135 mm | |
| Wireless Range | 15 m | 10 m | |
| Wireless Type | Bluetooth | Bluetooth |
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