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Sennheiser HDR 120 RF 20hrs Black
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Logitech H820e DECT 10hrs Black
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Technical Specifications
| AC Adapter Included | - | Yes | |
| Acoustic System Name | Open Back | Closed Back | |
| Battery Life (max) | 20 hours | 10 hours | |
| Battery Technology | - | Lithium-Ion (Li-Ion) | |
| Battery Type | AAA | - | |
| Boom Microphone | - | Yes | |
| Cables Included | - | USB 2.0 | |
| Charging Source | - | Charging stand | |
| Colour of Product | Black | Black | |
| Connectivity Technology | Wireless | Wireless | |
| Depth | - | 165 mm | |
| Driver Type | Dynamic | - | |
| Ear Coupling | On-ear | On-ear | |
| Ear Coupling - On-ear | Yes | Yes | |
| Headphone Frequency | 22 - 19500 Hz | 150 - 7000 Hz | |
| Headphone or Headset | Headphones | Headset | |
| Headphone Sensitivity | 106 dB | 103 dB | |
| Headset Type | Dual Ear | Dual-ear | |
| Height | - | 50 mm | |
| Impedance | 24 Ω (Ohms) | - | |
| LED Indicators | - | Yes | |
| Mac Operating Systems Supported | - | macOS 10.7 or higher | |
| Microphone Frequency | - | 100 - 7000 Hz | |
| Microphone Number | 1 | 1 | |
| Microphone Sensitivity | - | -45 dB | |
| Multi-function Control - Position | 1 | On-ear | |
| Multi-function Control - Type | Digital | Digital | |
| Multi-function Control Present | Yes | Yes | |
| Number of Batteries Supported | 2 | - | |
| Purpose | - | Call center/Office | |
| Rechargeable | - | Yes | |
| RF Connectivity | Yes | - | |
| Volume Control Present | Yes | Yes | |
| Volume Control Type | Rotary | Button | |
| Wearing Style | Head-band | Head-band | |
| Weight | 230 g | 128 g | |
| Width | - | 174 mm | |
| Windows Operating Systems Supported | - | Windows Vista® or higher | |
| Wireless Range | - | 100 m | |
| Wireless Type | - | DECT |
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