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Sennheiser HDR 120 RF 20hrs Black
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Plantronics W8220/A BT 4.2 13hrs Black
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Technical Specifications
| AC Adapter Included | - | Yes | |
| Acoustic System Name | Open Back | Closed Back | |
| Battery Life (max) | 20 hours | 13 hours | |
| Battery Recharge Time | - | 3 hours | |
| Battery Technology | - | Lithium Polymer (LiPo) | |
| Battery Type | AAA | - | |
| Bluetooth | - | Yes | |
| Bluetooth Profiles | - | A2DP, AVRCP, HFP, HSP | |
| Bluetooth Version | - | 4.2 | |
| Boom Microphone | - | Yes | |
| Cables Included | - | USB, USB Type-C | |
| Colour of Product | Black | Black | |
| Connectivity Technology | Wireless | Wireless | |
| Driver Type | Dynamic | - | |
| Driver Unit Size | - | 32 cm | |
| Ear Coupling | On-ear | On-ear | |
| Ear Coupling - On-ear | Yes | Yes | |
| Headphone Frequency | 22 - 19500 Hz | 20 - 20000 Hz | |
| Headphone or Headset | Headphones | Headset | |
| Headphone Sensitivity | 106 dB | 118 dB | |
| Headset Type | Dual Ear | Dual-ear | |
| Impedance | 24 Ω (Ohms) | 32 Ω (Ohms) | |
| Microphone Frequency | - | 100 - 6800 Hz | |
| Microphone Number | 1 | 1 | |
| Microphone Sensitivity | - | 112 dB | |
| Multi-function Control - Position | 1 | On-ear | |
| Multi-function Control - Type | Digital | Analogue | |
| Multi-function Control Present | Yes | Yes | |
| Noise Cancelling | - | Yes | |
| Number of Batteries Supported | 2 | - | |
| Power Button | - | Yes | |
| Purpose | - | Call center/Office | |
| Rechargeable | - | Yes | |
| RF Connectivity | Yes | - | |
| Volume Control Present | Yes | Yes | |
| Volume Control Type | Rotary | Rotary | |
| Wearing Style | Head-band | Head-band | |
| Weight | 230 g | 160 g | |
| Wireless Range | - | 180 m | |
| Wireless Type | - | Bluetooth |
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