Headphones Challenger R2H-D22F29
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| Design: | Invoices |
| Description: | Design: on-ear, device type: wireless headphones, design features: neodymium magnets, foldable design |
| Additional Information: | Automatic shutdown, volume control, channel switch; Battery type: AAA; Wireless transmitter: yes; Data transmission channel: infrared channel; Number of batteries: 2 |
| Design features: | Neodymium magnets, foldable design |
| Device type: | Wireless headphones |
| Mount type: | Headband |
| Technology: | Dynamic |
| Wireless connection type: | Infrared channel |