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Sennheiser PC 21-II Headset / Mfr. No.: 504520

Sennheiser PC 21-II Headset / Mfr. No.: 504520
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Item Number: sen-504520
Vendor Number: 504520
Vendor: Sennheiser
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At home or in the office, the PC 21-II headset has been specially designed for easy internet-based phoning. Its single-sided wearing style lets you enjoy the conversation while being in touch with what's going on around you. And the lightweight, adjustable headband is comfortable to wear all day long.

So you can be sure that you are clearly heard, the PC 21-II has an improved noise canceling microphone. It reduces background noise, to give you great voice quality, and is highly sensitive too, making it perfect for when you want to use speech recognition applications. Just adjust its flexible boom arm. Move it up/down or forward/back to position it where it needs to be.

General Information

ManufacturerSennheiser Electronic Corporation
Manufacturer Part Number504520
Manufacturer Website Address
Product SeriesPC
Product ModelPC 21-II
Product NamePC 21-II Headset
Product TypeHeadset

Technical Information

Connectivity TechnologyWired
Cable Length9.84 ft
Sound ModeMono
Impedance32 Ohm
Minimum Frequency Response40 Hz
Maximum Frequency Response18 kHz


Earpiece DesignOver-the-head
Earpiece TypeMonaural
Earpiece Sensitivity109 dB


Microphone TechnologyNoise Cancelling
Microphone DesignBoom
Microphone Sensitivity-38 dB


Host InterfaceMini-phone

Physical Characteristics

Form FactorSemi-open
Weight (Approximate)2.12 oz
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