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Sennheiser HDR 175 RF 18hrs Black
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Sennheiser RS 195 18hrs Black
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Technical Specifications
| Acoustic System Name | Closed Back | Closed Back | |
| Battery Life (max) | 18 hours | 18 hours | |
| Battery Technology | Nickel-Metal Hydride (NiMH) | Nickel-Metal Hydride (NiMH) | |
| Battery Type | AAA | AAA | |
| Colour of Product | Black | Black | |
| Connectivity Technology | Wireless | Wireless | |
| Driver Type | Dynamic | - | |
| Ear Coupling | Over-ear | Over-ear | |
| Ear Coupling - Over-ear | Yes | Yes | |
| Headphone Frequency | 17 - 22000 Hz | 17 - 22000 Hz | |
| Headphone or Headset | Headphones | Headphones | |
| Headphone Sensitivity | 114 dB | 117 dB | |
| Impedance | - | 32 Ω (Ohms) | |
| Multi-function Control - Position | On-ear | On-ear | |
| Multi-function Control - Type | Digital | Digital | |
| Multi-function Control Present | Yes | Yes | |
| Number of Batteries Supported | 2 | 2 | |
| Receiver Included | - | Yes | |
| Rechargeable | Yes | Yes | |
| Replaceable Ear Pads | Yes | - | |
| RF Connectivity | Yes | Yes | |
| RF Frequency Band | 2.4 - 2.48 GHz | 2.4 GHz | |
| Surround Sound | Yes | - | |
| Volume Control Present | Yes | Yes | |
| Volume Control Type | Button | Digital | |
| Wearing Style | Head-band | Head-band | |
| Weight | 310 g | 340 g | |
| Wireless Range | 100 m | 100 m | |
| Wireless Type | RF | RF |
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