Wireless USB headset;Headphone frequency response: 20-20.000 Hz;Microphone frequency response: 100-10.000 Hz;Sensitivity: 62 dBV/μBar; 42 dBV/Pa +/-3 Db;Wireless Protocol: 2.4 GHz

Input Impedance: 22Ohms;Sensitivity (headphone):122 dB +/-3 dB;Sensitivity (microphone): -44dBV/PA +/- 2.5dB;Frequency response (Headset):20Hz to 20kHz;Frequency response (Microphone):100Hz to 6500Hz;Cord length:1.8m(5.9 ft)

Packaged Quantity:  1;Color:  graphite;Additional Features:b  Skype compatible, adjustable headband, noise canceling circuit;Type: b headset;Manufacturer: Logitech

Packaged Quantity:  1;Additional Features:  USB PC Link, noise canceling circuit;Type:  headset;Manufacturer: Logitech;Headphones Form Factor:  Supraaural;Sound Output Mode:  stereo;Frequency Response:  50 Hz

Driver: 31 mm diameter; Frequency response: ;Headset: 20 Hz – 20,000 Hz;Microphone: 100 Hz – 10,000 Hz;Sensitivity: -62 dBV/µBar; -42 dBV/Pa +/- 3 dB;Connection:USB;6-ft (1.8-m) cable

Total RMS Power: 1.2watts RMS(0.6 watts per satellite);Frequency Response:90 Hz–20 kHz;Drivers: 5.1cm dynamic drivers;Connectivity:USB cable(1.2m); Power Source:Notebook via USB; Power Indicator:Amber LED

Packaged Quantity:1;Product Type: Earphones;Weight:0.42 oz;Color: purple splatter;Type:  headphones;Manufacturer:Logitech;Headphones Form Factor:  In-ear;Sound Output Mode:  stereo;Frequency Response: 20 Hz;Signal-To-Noise Ratio:  24 dB;Sensitivity :105dB/mW;Impedance:16Ohm

R400; Product Type:Presentation remote control;System Requirements:Windows® XP, Windows Vista® USB port;Supported Devices:Personal computer;Connectivity Technology:Radio;Max Operating Distance:15m;Battery:Standard-AAA type; Built-in slideshow buttons,Red laser pointer with LED indicator

Amplification type : active;Woofer size (inches): 2 m;Nominal output power (total):  25 Watt;Response bandwidth:  48 - 20000 Hz; Audio amplifier:  integrated;Connectivity:  wired;Controls power:  on/off, volume

Speaker type: subwoofer;Speaker System Type PC:  multimedia speaker system;Speaker quantity:  2 speakers, subwoofer;System configuration: 2.1-channel;Manufacturer: Logitech; Nominal output power (total):25 Watt

Speaker type: subwoofer;Speaker System Type PC: multimedia speaker system;Speaker quantity:  2 speakers, subwoofer;System configuration:  2.1-channel;Manufacturer: Logitech;Nominal output power (total):30Watt

Speaker type:  subwoofer;Speaker System Type PC:  multimedia speaker system;Speaker quantity:  2 speakers, subwoofer;System configuration: 2.1-channel;Woofer size (inches): 6.5m;Nominal output power (total):40Watt;Response bandwidth:48-20000 Hz