1. Page 1 Flexibility > Performance > Style GN 500 Series Stereo PC Multimedia Headsets Technical Specifications GN Netcom Marketing GN Netcom Confidential

2. Page 2Flexibility > Performance > Style GN 501SC – For the style and budget conscious Inline Mute and Volume Gold Plated Sound Card Connections Over-the-head stereo headset and microphone 3.5mm gold-plated plugs connect to sound card Convenient in-line mute and volume for easy access Noise-canceling microphone with adjustable boom for precise speech input Lightweight for hours of comfort Neodymium drivers enhance your listening experience If you’re on a budget, but still want a stylish headset with solid capabilities and great quality sound…

3. Page 3Flexibility > Performance > Style Electrical / Acoustical Specification Receiver Specification Sensitivity: +13 dB Pa / V  3 dB @ 1 KHz Frequency Response:20 Hz – 20 KHz Channel Unbalance:3 dB max. Distortion (THD+N):2 % max. @ < +5 dBV Impedance of speaker: 32 ohms  10% Impedance of system: 39 ohms  15% Max. Acoustic Output:No protection – Typ. 121 dB SPL @ 20 Hz – 20 KHz Microphone Specification Sensitivity: -42 dB V/ Pa  5 dB @ 1 KHz Frequency Range:100 Hz – 10 KHz Distortion:2 % max. @ 200 Hz Microphone type:Noise Canceling Bias voltage range:2 V (min)3 V (typ)9 V (max) Bias resistor range: 1 K (min) 2.2 K (typ) 10 K (max) Cable and plug Specification Cable Length: Sound Card to Inline mute: 1700 mm  20 mm Inline mute to headset: 600 mm  20 mm Sound card plug:3.5 mm Stereo Jack connectors Inline volume control TX Mute:Min 60 dB when muted Type:Inline mute and volume box RX Adjustment: Type:Logarithmic potmeter Range:0 % to 100 % Attenuation at 50%:15 dB typ. GN 501SC – Technical Specifications

4. Page 4Flexibility > Performance > Style GN 503SC – Flat out better performance Over-the-head stereo headset and microphone Oversized 40mm speakers for maximum bass response Speakers fold flat for easy storage and portability 3.5mm gold-plated plugs connect to sound card Convenient in-line mute and volume for easy access Noise-canceling microphone with adjustable boom for precise speech input Lightweight for hours of comfort Neodymium drivers enhance your listening experience Want better performance without breaking the bank? Start with all the features of the GN 501SC plus deeper, smoother base response… Inline Mute and Volume Gold Plated Sound Card Connections Oversized 40mm speakers Speakers Fold Flat

5. Page 5Flexibility > Performance > Style Electrical / Acoustical Specification Receiver Specification Sensitivity: +12 dB Pa / V  3 dB @ 1 KHz Frequency Response:20 Hz – 20 KHz Channel Unbalance:3 dB max. Distortion (THD+N):2 % max. @ < +5 dBV Impedance of speaker: 32 ohms  10% Impedance of system: 39 ohms  15% Max. Acoustic Output:No protection – Typ. 125 dB SPL @ 20 Hz – 20 KHz Microphone Specification Sensitivity: -42 dB V/ Pa  5 dB @ 1 KHz Frequency Range:100 Hz – 10 KHz Distortion:2 % max. @ 200 Hz Microphone type:Noise Cancelling Bias voltage range:2 V (min)3 V (typ)9 V (max) Bias resistor range: 1 K (min) 2.2 K (typ) 10 K (max) Cable and plug Specification Cable Length: Sound Card to Inline mute: 1700 mm  20 mm Inline mute to headset: 600 mm  20 mm Sound card plug:3.5 mm Stereo Jack connectors. Inline volume control TX Mute:Min 60 dB when muted Type:Inline mute and volume box RX Adjustment: Type:Logarithmic potmeter Range:0 % to 100 % Attenuation at 50%:15 dB typ. GN 503SC – Technical Specifications

6. Page 6Flexibility > Performance > Style GN 502USB – The difference is digital Behind-the-neck stereo headset and microphone Enhanced-digital plug-and-play USB connection Digitally optimized Neodymium drivers for a full, rich stereo sound Convenient in-line mute and volume for easy access Noise-canceling microphone with adjustable boom for precise speech input Lightweight with pillow-soft ear cushions for hours of comfort Digital USB Connection Inline Mute and Volume Behind-the- neck comfort Want better performance without breaking the bank? Start with all the features of the GN 501SC plus pristine digital-quality stereo and behind-the-neck comfort…

7. Page 7Flexibility > Performance > Style Electrical / Acoustical Specification Receiver Specification Sensitivity: +4 dB Pa / Vd  3 dB @ 1 KHz Frequency Response:20 Hz – 20 KHz Channel Unbalance:3 dB max. Distortion (THD+N):2 % max. @ < 0 dBVd Impedance of speaker: 32 ohms  10% Impedance of system: 78 ohms  15% Max. Acoustic Output:Max. 118 dB SPL @ 20 Hz – 20 KHz Microphone Specification Sensitivity: -15 dB Vd/ Pa  5 dB @ 1 KHz Frequency Range:100 Hz – 10 KHz Distortion:2 % max. @ 200 Hz Microphone type:Noise Canceling Cable and plug Specification Cable Length: Connector to USB Box 220 mm  20 mm USB Box to Inline mute: 1700 mm  20 mm Inline mute to headset: 600 mm  20 mm USB ConnectorType “A” USB Connector GN 502USB – Technical Specifications

8. Page 8Flexibility > Performance > Style USB Specification Version 1.1 Transmission rateFull Duplex, 12 Mbps Sampling Frequency44.1 KHz and 48 KHz Visual IndicatorGreen LED on box flashed when plugged into computer CompatibilityPlug and play for Windows 98SE, Windows ME, Windows 2000, Windows XP, Macos 9.2, Macos X, and Linux Red Hat 9 Operating Voltage4.5V (min) 5.0V (typ) Current Consumption90 mA (typ) 100 mA (max) Inline volume control TX Mute:Min 60 dB when muted Type:Inline mute and volume box RX Adjustment: Type:Logarithmic potmeter Range:0 % to 100 % Attenuation at 50%:15 dB typ. GN 502USB – Technical Specifications Continued

9. Page 9Flexibility > Performance > Style GN 503USB – The difference is digital Digital USB Connection Over-the-head stereo headset and microphone Enhanced-digital plug-and-play USB connection Lightweight with pillow-soft ear cushions for hours of comfort Oversized 40mm speakers for maximum bass response Digitally optimized Neodymium drivers for a full, rich stereo sound Convenient in-line mute and volume for easy access Noise-canceling microphone with adjustable boom for precise speech input Speakers fold flat for easy storage and portability Your most demanding applications, require premium performance. Get all the benefits of the GN 503SC plus ultra plush ear cushions and pristine digital-quality stereo… Inline Mute and Volume Pillow-soft Ear Cushions Speakers Fold Flat

10. Page 10Flexibility > Performance > Style Electrical / Acoustical Specification Receiver Specification Sensitivity: +11 dB Pa / Vd  3 dB @ 1 KHz Frequency Response:20 Hz – 20 KHz Channel Unbalance:3 dB max. Distortion (THD+N):2 % max. @ < 0 dBVd Impedance of speaker: 32 ohms  10% Impedance of system: 78 ohms  15% Max. Acoustic Output:Max. 118 dB SPL @ 20 Hz – 20 KHz Microphone Specification Sensitivity: -15 dB Vd/ Pa  5 dB @ 1 KHz Frequency Range:100 Hz – 10 KHz Distortion:2 % max. @ 200 Hz Microphone type:Noise Canceling Cable and plug Specification Cable Length: Connector to USB Box 220 mm  20 mm USB Box to Inline mute: 1700 mm  20 mm Inline mute to headset: 600 mm  20 mm USB ConnectorType “A” USB Connector GN 503USB – Technical Specifications

11. Page 11Flexibility > Performance > Style USB Specification Version 1.1 Transmission rateFull Duplex, 12 Mbps Sampling Frequency44.1 KHz and 48 KHz Visual IndicatorGreen LED on box flashed when plugged into computer CompatibilityPlug and play for Windows 98SE, Windows ME, Windows 2000, Windows XP, Macos 9.2, Macos X, and Linux Red Hat 9 Operating Voltage4.5V (min) 5.0V (typ) Current Consumption90 mA (typ) 100 mA (max) Inline volume control TX Mute:Min 60 dB when muted Type:Inline mute and volume box RX Adjustment: Type:Logarithmic potmeter Range:0 % to 100 % Attenuation at 50%:15 dB typ. GN 503USB – Technical Specifications Continued