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Features

Overview: The HDR 120 is an additional (or replacement) headset for the Sennheiser RS 120 or RS 110 wireless headphone system (item number 143RS120, sold separately) with an open air, on-ear design.

Batteries: Power for the headset is provided by two rechargeable "AAA" batteries (included) that fit into a compartment in the headset. The batteries are recharged whenever the headset is placed on the transmitter included with the RS 120 system. Fully charged batteries have an operating time of approximately 20 hours. The RS 120 system manual recommends an initial charging of 24 hours before the batteries are first used, after that the normal charging time is approximately 18 hours. Note: Only rechargeable batteries should be used.

Controls:

• Volume: thumbwheel volume adjustment; on the right earcup
• Tuning: tune the headset to the transmitter for the clearest reception; on the right earcup
• Power: turn the headset on/off; on the left earcup

Specifications:

• Reception Frequency: 926-928 MHz
• Modulation: FM stereo
• Frequency Response: 22-19,500 Hz
• Maximum SPL: 106 dB
• Weight: 8.1 oz